A high school student comedy story disguised as a high school student infiltrating the disappearing gold bars of Emperor Gaozong.

Zheng Haicheng officially launched a confidential combat plan, and at the same time, his story with the Fourth Group of the National Intelligence Agency also kicked off.He set out to investigate a criminal group that attempted to illegally transport the half-loof contemplative statue - a precious cultural heritage, the National Treasure No. 83 of the Republic of Korea (currently collected in the National Central Museum of South Korea).With his extraordinary skills, he easily subdued the other party and chased the escaped President Park all the way, and finally successfully regained the half-loof contemplation statue.He was quick and his eyes were like an eagle. This duel was tense and exciting. Every move was like careful planning, making people unable to look away.

However, just as the mission is about to end successfully, a sudden accident broke the peace.Originally just to shock the enemy's shooting, he accidentally deviated from the target and directly hit the statue's arm, causing it to break.This mistake put Zheng Haicheng in an unprecedented dilemma and even faced the danger of being expelled from the National Intelligence Agency.In order to retain his identity, he had to accept a new task: investigate the mystery of gold nuggets left by Li Bingwen, the founder of Bingwen High School, and decide to sneak into the school and turn into a student to investigate.

On campus, Zheng Haicheng unexpectedly met Wu Xiuya.At that time, she was confronting a troubled drinker in her mother's restaurant.Zheng Haizhen immediately stepped forward and quickly subdued the other party, showing his heroic and handsome side.Xiuya's heart moved, but before she could think too much, she actually saw him again at school.“How come you are here?” She widened her eyes in surprise.Zheng Haicheng put his hands in his pockets and answered as if nothing had happened: “Hey, it is impolite to speak in that tone.”His half-joking tone made Soo a little annoyed.“Hey, who are you?”The two's tit-for-tat conversation made the atmosphere subtle and interesting, and this unexpected encounter brought many unknown factors to his disguise of student actions.

During the exploration of the campus, Zheng Haicheng noticed a dilapidated old building.Despite his appearance, the numbers on the meter were still beating, which aroused his alertness.He carefully checked the surroundings and felt that there was something wrong with the building, which might be related to the rumors of gold nuggets.So he decided to come again at night to find out.

As night fell, he quietly sneaked into the old museum, looking for a secret passage to the underground.Just as he was about to step into the stairs, a sound of metal loading suddenly came from behind him, and a gun pointed straight at his back.He held his breath, his eyes instantly becoming sharp.He encountered such a dangerous situation at the beginning of his operation. It seems that this mission is even more complicated and difficult than he expected.

Zheng Haicheng (played by Xu Kangjun), a trump card member of the National Intelligence Academy, bravely recovered the stolen cultural relics, but unexpectedly caused damage to the cultural relics and faced punishment.In order to avoid being fired from his colleagues together, Haicheng decided to take on a new task: pretend to be a high school student and sneak into Bingwen High School, and retrieve the Gaozong gold bars worth more than 800 million yuan that were privately hidden by Bingwen Consortium.

Haicheng heard the strange stories about the old school museum from his deskmate Li Dongmin, and found that although no one was there, there was a power meter, which was very suspicious.The first infiltration was stopped by Wu Xiuya (played by Qin Jizhou). Second, he went in with Dongmin and discovered a secret that was more shocking than the gold bar.

Wu Xiuya was a hired teacher at Bingwen High School. In order to become a regular, she did not hesitate to get drunk during the dinner to please the vice principal. As a result, she grabbed the vice principal's wig and made a fool of herself.Xiuya returned to the small restaurant run by her mother and met a few gangsters who were lying to make trouble. They were about to fight. At this time, Haicheng, who was drinking in the store, took action to stop it, causing the drunk Xiuya to bump into the drunken Xiaoya.

When he went to work the next day, Xiuya found that the new transfer student was actually the handsome guy from yesterday and had doubts about his true identity.Park Tae-soo, who was in the same class, bullied people everywhere in school because his father was a member of parliament. He spitted into Dongmin's lunch and asked him to eat it. Hae-sung helped Dongmin to rescue him, but was photographed by his classmates to surf the Internet.Xiuya mistakenly thought that Hae-sung was the perpetrator, while Hae-sung's teammates found it was in big trouble...

Dongmin told Hae-sung that the basement floor of the old museum in Bingwen High School was originally a ballet practice room. A female student who dreamed of being a ballet dancer was often bullied by her classmates. One day she ran away and lost her legs when she lost her legs. She hanged herself in the practice room in despair.The bullies discovered her body hidden under the floor, and the building began to be haunted.

Hai Cheng and Dongmin came to the old museum while the night was dark and found a secret room full of documents. It turned out that Xu Mingzhu (played by Jin Xinlu), the chairman of the Bingwen Foundation, was also looking for gold bars; someone was setting a nail on the floor of the practice room, and there was actually a corpse wearing a school uniform under the floor!

Hai Cheng (played by Seo Kang-jun) successfully sneaked into high school and tried to integrate into campus life, but unexpectedly he was framed as a school tyrant, and the slander was still a deskmate Dongmin (played by Shin Jun-hang).Taixiu (played by Zhang Chengfan) threatens Dongmin's grandmother, causing him to wrongly accuse Haicheng. Dongmin, who was caught in the weakness, could only obey.Dongmin told Haicheng“ that if they didn't wrong you, they would let my grandma stay in prison for the rest of her life.What else can I do in this case?I can’t fight, I’m a mess of grades, I’m isolated, I’m a waste, what else can I do?Do you think I haven't thought about it?Do you want to call the police?Do you want to tell the teacher?Or just kill him with a knife?I fantasized about him dying dozens of times a day, and even felt that prison was easier than school.But what if I really go in, what should my grandma do?Do you know what is most unwilling to accept?Reality is not a fairy tale.Because of the injuries and psychological trauma, I will always live like a loser, but he has long forgotten to bully me and live a happy life.” 

Because Dongmin and Tae-soo's % indexes, Hae-sung was summoned to the school violence committee.In order to prove that Tae-soo was involved in gambling, Hae-sung found President Gu Shang-tae (played by Zhao Jae-yun), who runs the gambling website, and asked him to come forward to testify, thus revealing the fact that Tae-soo used the illegal gambling website.In addition, Dongmin took advantage of the situation to expose Tae-soo's past evil deeds, and the matter came to an end for the time being.

At the same time, the second horror rumor surrounding Bingwen High School was also revealed.Rumors say that a female student pushed her off the rooftop because she was jealous of her friend who had long been ranked first. But soon after, the female student who killed her friend also died mysteriously.Therefore, the horrible rumors about not staying in school when the bell rings, spreading on campus, making people shudder.

In order to reveal the truth, Haicheng investigated the large wall clock on the first floor of the school and found that there was also an identical clock in the student union room.In order to find out the truth, he decided to become a student union cadre in order to enter the student union room for investigation. In order to meet one of the conditions for becoming a cadre - collecting the signatures of 100 recommenders, he cooperated with 4 domestic teams.

Haicheng had to absent from work due to the emergencies of reserve training. He barely managed to overcome the difficulties under the pretext of physical discomfort, but the head teacher Wu Xiuya (played by Qin Jizhou) said that he wanted to visit his home because he was worried about him, which made the situation even more difficult.However, the registered residence on Haicheng's life file, the rooftop room was empty.In order to make the room look like it is inhabited, 4 teams in China launched a tense battle.

Just as Mi-jeong (Yin Ke-er) and Yingxun (Zhao Fulai) and others had just finished decorating the room and were about to leave, Xiu-ya suddenly arrived, and everyone hid in the closet in despair.Xiuya fell down because she stepped on a massage ball on the ground, and Haiseong, who was directly opposite, fell down together. The two of them kissed unexpectedly.In order to stop Younghoon from sneezing, Mi-jung directly blocked his mouth. As a result, Younghoon fainted on the spot and fell out of the wardrobe. The scene was once chaotic...

After unremitting efforts, Hai Cheng finally ranked among the top ten in the school, meeting the prerequisites for running for student union cadres.In order not to leave other candidates with a chance to surpass him, he tried to make some strategic contact with Li Yina, who has the right to select cadres, but unfortunately, his actions did not achieve the expected results, but instead made the atmosphere on the scene extremely awkward.Despite this, Hai Cheng was eventually successfully elected as a student union cadre, adding a bit of drama to the entire incident.

At the same time, Wu Xiuya has deep doubts about Hai Cheng’s true identity.She recalled the scene in the house and decided to take action.She not only contacted Haicheng's school before transferring to the school for investigation, but also invited her colleague Jin Lian'an to assist in monitoring the actions of the four domestic groups of the National Intelligence Agency.It is really exciting to see whether Wu Xiuyan's keen insight can uncover the true veil of Haicheng.

Within the student union, the relationship between Zheng Haicheng, Lee Yina and An Youjing has become increasingly subtle.Haicheng noticed that Yu Jing was deliberately keeping a distance from him, so he took the initiative to get closer, trying to get closer to each other.However, all this was seen by Yina, which made her guess about the relationship between the two.Finally, at Yina's suggestion, the three of them had dinner together.During the meal, Haicheng witnessed Yi Na's contempt and instructing Youjing, and couldn't help but stand up for Youjing.Yujing also took this opportunity to express her inner grievances, which made people feel pity.

At this moment, Haicheng decided to sneak into the student council room late at night and uncover the secret behind the big clock.Just as he was checking intently, an envelope suddenly slipped into the crack of the door, which read: “Hello, Agent Zheng Haicheng.”Immediately afterwards, the guard Mr. Jin called and invited him to meet at the school rooftop in a low voice.This sudden invitation made the atmosphere strange.

However, the meeting unexpectedly turned into a thriller event.The midnight bell rang, and an ominous aura filled the campus.Not long after, the second rumored story seemed to come true - Mr. Jin died strangely.What is even more shocking is that he held Hai Cheng's father Zheng Zai-hyun's notebook in his hand, which made Hai Cheng fall into confusion and panic in an instant.

Guard Mr. Jin was originally scheduled to meet with Hai Cheng on the roof, but unexpectedly had a fierce fight with a mysterious man, but unfortunately fell from the roof and died.Hae-sung rushed to the scene and witnessed Mr. Jin who was lying on the ground, and found out from him the notebook left by his missing father Zheng Jae-hyun, which made him realize that there was a more complicated story behind it.

Just as Hai Cheng was thinking, he keenly noticed that a man was peeping at him in secret.He pursued without hesitation, and the two fought fiercely to the roof.However, just as Hai Cheng was about to catch the other party, an abnormal sound came from outside the roof door.He subconsciously looked back and checked, and the mysterious man took the opportunity to escape.Not long after, the truth was revealed. It turned out that Xu Mingzhu and Park Jae-woon were the masterminds behind all this. This reversal was jaw-dropping.

Haicheng took the notebook to find Director Jin and angrily asked him why his father's notebook appeared in Mr. Jin's hands.He grabbed Director Jin's collar with excitement, and the atmosphere was extremely tense.During this confrontation, Haicheng learned that his father's last mission before his disappearance was inextricably linked to the actions he was currently carrying out.What shocked him even more was that the National Intelligence Agency had already known about his father's mysterious disappearance, but chose to be secretly disclosed.Haicheng was furious and vowed to reveal all the truth.

In order to explore the secret of the clock, Haicheng came to the student union room.He pieced together keywords based on clues in his notebook and accidentally discovered that the school song of Bingwen High School was actually playing in the clock.He suddenly realized that this song might have hidden more clues.Just as he was recording the bell and about to leave, Sooya suddenly appeared, causing the atmosphere to suddenly become tense.

Sooya recalled the night of Mr. Kim's death and saw Hae-sung on the roof, so she had a strong doubt about his identity.The audience's hearts also hang.However, Haicheng chose to be honest and reciprocal, and bluntly revealed to Xiuya that she was an agent of the National Intelligence Agency, and explained her purpose of infiltration.This sudden revelation made the plot even more ups and downs.

At the same time, Haicheng began to investigate the mystery of the grand piano in the rumor of “3.With Soo-ya's assistance, he found a grand piano from the 1950s in the chairman's room.The two decided to use the school's ”Bingwen Night “ activity to sneak into the survey.However, due to too many violation records of Haicheng, he was unable to participate in the event, which brought obstacles to the plan.To help him lower his violation score, Sooya came up with a bold idea - to let him participate in the school's promotional model selection.

Later, the two left together after drinking in Xiuya's mother's shop, but encountered a sudden heavy rain.Xiuya's mother shouted from the store: ” Wu Fengzi!Take an umbrella!“ and hand them an umbrella.When Haicheng heard the name ” Fengzi%, he instantly recalled his childhood sweetheart, and an inexplicable emotion surged in his heart.On a rainy night, the two of them held an umbrella together. When the motorcycle rushed by and splashed everywhere, Hai Qian could hold Xiuya into his arms.

When investigating the third bizarre story, the National Intelligence Agency found that the school song recorded by Hai Cheng on the landing clock was actually a four-handed joint.In order to find clues to the weird talk, the two had to play the school song together. In the process of finding a suitable performer, Sooya joined them and worked closely with the four domestic groups.In particular, Hae-sung and Soo-ah showed a perfect team understanding and successfully obtained the fingerprint of the principal Park Jae-moon (played by Park Jin-woo), and removed the security system of the chairman's office.

The grand “Bingwen Gao Night ” event officially kicked off.On this day, Gao Yingxun (played by Zhao Fulai) took advantage of Xu Mingzhu (played by Kim Shin-rok) meeting with his parents alone, and went to the distribution room to cut off the power.Although Hae-sung and Soo-a took the opportunity to act and tried to enter the chairman's office, the electricity recovered faster than expected, causing the operation to fall into crisis.In order to solve this emergency, Park Mi-jung (played by Yoon Kerr) and Young-hoon tried their best to perform an impromptu drama, and in order to attract the attention of the security guard, they did not hesitate to kiss boldly.Thanks to the time Mijun and Young-hoon won, Hae-sung and Soo-ah successfully arrived in front of the chairman's office.However, the security guard suddenly appeared, and the two who were forced into desperate situation had to fight.After physical training, they joined forces to defeat Baoquan and successfully broke into the office.

Haicheng accidentally learned the shocking truth. Due to a keyboard failure, the two failed to successfully play the school song and had to leave the chairman's office in a hurry.However, when Hai Cheng deleted the browsing record on Xu Mingzhu's computer, he accidentally found a file called “ combat plan_undercover college ”, which not only included the activity combat plan, but also contained Hai Cheng's personal file... Seeing everything Hai Cheng fell into chaos, he realized that he was being used by Xu Mingzhu, and there were traitors within the National Intelligence Agency.

After some hesitation, Xiuya finally visited the website written by Han Cheng on the business card dropped by (played by Lee Hyun-zhao) and was shocked to find a list of school results specifically for VIP students.Soo-ah tells Hae-sung this fact, and Hae-sung realizes that ordinary students, including Yu-jeong (played by Park Se-hyun), may also be affected, so he decides to join forces with Soo-ah to investigate the fraud incident.The two found out that Xu Mingzhu obtained the resources needed for the education city project from their parents by manipulating the students' grades.

However, at this moment, Haicheng ushered in a new crisis - the superior issued an order to interrupt the task, and he had to leave the school.Haicheng felt that this order came suddenly after they investigated the fraudulent fraud incident, which was too suspicious.So, he deliberately hinted to Xu Mingzhu that he knew the inside story of the fourth weird story, and tried to stay and continue to act.

Xiuya discovers that Li Junhao (played by Lu Zhongxian) is also involved in a fraud case, so she rushes to Haicheng's home.But not long after, Xiuya was found lying on the ground, with blood flowing...

Zheng Haicheng and Wu Xiuya finally returned to school after going through twists and turns.But the peaceful days did not last long. Xu Mingzhu was investigated by the police for suspected corruption and appeared mysteriously, causing the entire campus to be shrouded in a layer of haze again.Her return was like a cold wind passing by, causing an ominous premonition to arise in everyone's hearts.

The scandal about school grade fraud was finally revealed to the world, causing an uproar.What is even more shocking is that the culprit of the attack on Sooya was actually the math teacher Li Junhao, who was also the mastermind of manipulating the school's corruption case.Haicheng was surprised to find that Junhao was not only controlled by Mingzhu, but also stole his father's precious notepad.Faced with the crisis that was about to be exposed, Junhao asked Mingzhu for help, but was ruthlessly rejected by her. This made people wonder if Junhao still has a day to turn over.

The most praised scene in the play is the moment when Mingzhu's subordinate Park Jae-woon encounters a counterattack.Park Mi-jung and Go Young-hoon discover that Jun-hoon and Jae-moon are colluding, so they decide to follow.However, they are too reckless and are subdued by Jae Moon's men, and the scene is full of dramatic reversals and humor.At the critical moment, Hai Cheng stepped forward and quickly reversed the situation. This chase scene was exciting and the ending was even more unexpected.

In order to completely destroy Mingzhu's power, Haicheng personally went to the chairman's office to face Mingzhu, and asked her why she chose herself to participate in the struggle.Then, he played a shocking piece of news - Junhao had voluntarily surrendered and put pressure on Mingzhu.Immediately afterwards, he showed off the USB in his hand, which contained key evidence that he could bring down the pearl.However, Mingzhu was still calm and calm, and even though the closest Director Jin left her, she still showed a creepy smile.

When inspectors from the Education Department visited, Mingzhu and Jae-wen appeared together, and the atmosphere suddenly became tense.She greeted Xiuya gracefully, then tore off his famous brand in front of Haicheng without mercy, sneering: “This game between students is over.”

Mingzhu returned to school unscrupulously and unexpectedly learned the fourth weird keyword Haicheng was exploring, which shocked Haicheng.Her return triggered a series of chain reactions - Haicheng was immediately expelled from the school, the fourth group of the National Intelligence Institute was also facing disbandment, and all members were on standby.What is even more worrying is that Mingzhu also specifically warned Haicheng: “Wu Xiuya may also be in danger.”

Despite the difficulties, the members of the four domestic groups did not give up easily. They continued to investigate the truth of the strange story in depth and finally concluded that the gold nuggets were likely to be hidden in the statue of Li Bingwen on campus.So, Haicheng dressed up as a deliveryman and sneaked into the school, quietly approached the statue, and accidentally discovered that the statue could actually be moved.However, as he tried to explore further, the academic director Bai Guangdou suddenly appeared, forcing Haicheng to retreat temporarily.

At the same time, Hae-sung and Soo-a were caught in another storm.A group of photos of two people having sex with each other quickly spread on campus, causing principal Park Jae-moon to be furious and demanded that Soo-ah stop teaching.At this critical moment, Hai Cheng bravely stood up, revealed his true identity, and successfully resolved the storm into a misunderstanding.The turning point of all this was due to Li Yina's unexpected move - after she learned about Haicheng's true identity, she disclosed the news in advance, which calmed down the situation.However, in the face of Mingzhu's manipulation and the subsequent difficulties, how Haicheng and Xiuya should survive made people worry about them.

On the other hand, Mingzhu also began to suspect that there was a secret hidden in the statue, so she hurried to the school.But she didn't expect Haicheng to take the lead.Haicheng cleverly fabricated a lie that a spy was found on campus, blocked Mingzhu's way, took the opportunity to activate the statue's mechanism, and sneaked into the hidden underground space.As Hai Cheng continued to deepen, the atmosphere became more and more tense... However, when he finally arrived at his destination, everything in front of him shocked him - there was no trace of gold nuggets here.

But the real shock is still behind.Hidden under the ground, there was a white bone, and next to the bone, a watch was quietly lying - it was a gift from Hai Cheng to his father when he was a child.His heart trembled suddenly, and his eyes became wet in an instant.

Director Xu took his men back to the campus and headed straight to the secret room under the bronze statue.He frantically searched for gold in the secret room, but found nothing.With disappointment and madness intertwined, he collapsed and fainted because he could not find gold.

Haicheng held a funeral for his father, and the attendance of the whole class gave him great comfort.In a private appraisal agency, they found the Clark 17 pistol shell case left at the scene of Haicheng's father's death.This kind of pistol was only used by personnel at or above the National Intelligence Agency's team leader level 22 years ago.An Xihao followed this clue and found that the director had declared that the shell was lost.This discovery undoubtedly pushed Dean Jin to the position of the suspect who killed Haicheng's father.

Meanwhile, President Kim is holding a national security meeting at the Incheon Hotel.Haicheng took the opportunity to come to the hotel and managed to send off other personnel, questioning Dean Jin why he killed his father back then.However, just as President Jin was about to speak, the preservation staff arrived and took Haicheng away, so President Jin escaped.Afterwards, the 4th group members and Xiuya rushed to the hotel and successfully rescued Haicheng after a fierce battle.

Haicheng began to carefully analyze the cause of his father's death.Although Dean Jin's shell was found next to his father's body, he still felt that something was wrong.The dead guard, the contents of the notebook, and the death of his father all happened at Bingwen High School.In addition, Director Xu and the Director once set up a plan to allow him to participate in the battle.Therefore, he suspected that his father's death might be related to Director Xu.While in the Incheon hotel, Haicheng successfully hacked Dean Jin's mobile phone and installed monitoring and GPS functions to grasp its movements at any time.

By listening to Dean Jin, Haicheng discovered the amazing truth: the person who killed his father back then was Director Xu.Director Xu and the director once threatened his father with his life to hand over gold, but Xu Bingwen's secret vault was not gold at all.Director Xu didn't believe this and thought that Huang Jin was on campus, so he snatched Dean Jin's gun and fired at Haicheng's father.Haicheng's father was shot and hid in the secret room under the bronze statue, and eventually died.Since no one knew the existence of the secret room, everyone thought Haicheng's father was missing.

President Jin was worried that the murder of Haicheng's father would be exposed, so he asked Director Xu to deal with Haicheng.But Director Xu believes that gold is in Haicheng's hands and refuses to attack Haicheng.President Jin threatened Director Xu to tell him the true cause of Haicheng's father's death.This forced Director Xu to decide to attack President Jin.

Haicheng asked Dean Jin to meet him, but when he arrived, he found that Dean Jin had been stabbed several times in the car and was dying.At the same time, Haicheng was also attacked by a stick and fainted.When he woke up, he was holding a blood-stained knife in his hand.At this time, the police arrived and arrested Haicheng as the suspect who killed Dean Jin.

Director Xu came to the interrogation room and threatened Haicheng with Yuzhen's life to hand over the gold, and gave him a day to consider.On the way the police took Haicheng to the detention center, Haicheng fought with police officers and caused a car accident.He fled the scene with injuries and called Xiuya for help before he fell into a coma.

Director Xu has implemented a series of strict measures on campus, not only abolishing the scholarship system, but also raising tuition fees by 50%, causing many students to face a dropout crisis.Xiuya stepped forward and went to Bingwen Group to expose Director Xu's evil deeds. The Council decided to fire Director Xu based on the consortium regulations, based on the consent of three-quarters of the students and teachers.

At the same time, the police issued a national wanted order to Haicheng.In order to protect the people around you from Director Xu, Haicheng decided to take action personally and bring Director Xu to justice.The key evidence - the recording of Director Jin accusing Director Xu of murder is hidden in Dean Jin's home.So everyone decided to take a risk and sneak into the Jin family to find evidence.

Xiuya returned to Bingwen High School and posted a big-character poster to strongly condemn Director Xu’s actions and asked him to withdraw his unreasonable policies.In order to calm the situation, Director Xu proposed a policy of abolishment, but the condition was that Xiuya had to resign.This conversation was accidentally heard by Yoo-jung.In order to calm the emotions of teachers and students, Director Xu held an extraordinary meeting, promising to eliminate scandals such as fraud in grades and cancel new policies.However, Yoo-jung revealed the truth that Soo-ya was forced to resign in order to protect the students, which aroused strong dissatisfaction among the students, and they shouted that Xu Mingzhu had stepped down.

After some twists and turns, Haicheng finally obtained USB evidence of Director Xu's crime and went to the police station to clear his suspicion.The police immediately launched an arrest operation against Xu Mingzhu and the principal.After learning the news, Xu Mingzhu asked the principal to take Yi Na away first and activate the fire alarm, attempting to set fire to the school with gasoline and lighter.Haicheng arrived in time, handed over the pistol and persuaded Xu Mingzhu to release the innocent students.After leaving, Yina also returned to school and begged Seo Mingzhu to stop hurting others with Haicheng.Faced with the hope of the general situation, Xu Mingzhu tried to commit suicide, but Xiuya snatched the pistol in time.Haicheng caught the fallen lighter and resolved the crisis.The teachers and students applauded and cheered for this.

In the court's open trial of Xu Mingzhu's case, the principal exposed his crimes in a complete manner, and Xu Mingzhu was eventually sentenced to life imprisonment.Yina came to visit him and expressed her confusion about Xu Mingzhu's behavior and her still-existing love.Hai Cheng returned to Bingwen High School to visit everyone. Although everyone was deliberately cold at the beginning, when he left, the classmates threw paper planes filled with words of thanks from the window.The sky of the entire campus is filled with flying paper planes, and the scene is warm and touching.

While tidying up the attic of Haicheng's home, he accidentally found a hollow floor with star stickers.After prying open the wooden board, he found a large amount of gold.He immediately contacted An Xihao to report that the mission was completed.Five years later, Lee Dongmin published the novel - Undercover High School, Sooya became a formal teacher, Ahn Yoo-jung joined the National Intelligence Academy, and Yeona focused on her interests, Ahn Seok-ho was promoted to the president of the National Intelligence Academy, and the 4th group members Young-ho fell in love with Mi-jung, and Hae-sung and Soo-a finally got married.