Wei Zile (played by Zhang Yikang), the real culprit in the tiger killing case, was brought to justice and the matter came to an end.Senior Inspector Xu Junsen (played by Chen Zhanpeng) of O Ji Group A and Senior Inspector Shen Weili (played by Huang Zhixian) of O Ji Group B continue to solve many strange cases.The two investigated a serious case of international killers ravaging Hong Kong. They used supercomputers to search for clues in the Internet and successfully solved the case. However, they unexpectedly discovered that before Zi Le was arrested, he had sent encrypted messages and huge amounts of cryptocurrency to the dark web, which was apparently hidden.A huge conspiracy!Immediately afterwards, a “Mysterious Man” appeared in Hong Kong planning a large-scale destruction, and the “Mysterious Man” was related to the image of Zi Le.Junsen and Weili have to completely decipher the message as soon as possible, and at the same time they have to wrestle with “Mysterious Man”, and the outcome will be reversed again...

Wei Zile (played by Zhang Yikang), the mastermind behind the “Tiger Killing Case”, was arrested. He became crazy due to brain damage and will be imprisoned in a mental hospital for life.When a dignitary from an African country comes to Hong Kong, Mr. O is ordered to provide protection, but is suddenly attacked by multiple killers...

Policewoman Ma Yingsi (played by Lin Xiawei) withdraws her decision to resign and is transferred to the psychological services department. O-Ji detective Xu Junsen (played by Chen Zhanpeng) explores the possibility of getting back together, and Yingsi expresses that she has put aside her relationship.Another O-Ji detective, Detective Sim Weili (played by Huang Zhixian), and barrister Chung Jiayu (played by Jiang Zuman) sparkled in the court, and it turns out that the two have rekindled their love.

When the payment vehicle was robbed, Mr. O discovered that the robbers were assassins on an assassination mission and believed that they would commit crimes again.The killers are in internal strife, and the remaining two killers are at large. Junsen and others find key clues...

O Ji and the Flying Tigers broke into the killer's hiding place and found that the building was empty.Huo Taiyin's company encountered financial difficulties and helped the killer to evade capture. He wanted to use the killer to carry out assassination missions to please Ba Jin.Junsen and Weili came to talk to Mrs. Huo (played by Mai Lingling), but Mrs. Huo responded calmly.Mrs. Huo took the two killers to Ba Jin's villa to meet, and the situation suddenly changed... Jun

Sen, Weili and their subordinates rushed to the villa and encountered a gunfight. The three met the killer again... Yingsi went to university to study and attended the lectures of biology professor Tang Guanfeng (played by Fang Lishen) and left an impression on him.

The police were shocked to learn that there were highly encrypted messages on the dark web involving huge amounts of cryptocurrency, which were sent by Zi Le before his arrest...

A singer's nanny's car was hacked into and drove into people wantonly, injuring many people.Mr. O was ordered to find out the real culprit of the terrorist attack, but he had no clue. Unexpectedly, the hacker committed another crime, causing traffic light chaos...

O Ji found the hacker's hiding place, but the hacker escaped earlier and interfered with the computer system of the police vehicle. Junsen tried his best to pursue... Yingsi contacted Guanfeng on behalf of the police to help talk to Zi Le, and Guan Feng succeeded in convincing Zi Le during their first meeting.Le let down her guard and the two began to build a relationship.

Wei Li and Jia Yu start a semi-cohabitation life, but when they are sweet, their father Shen Hongfu (played by Li Longji) bumps into them, causing embarrassment.He Jian (played by David Jiang) hired Jiayu to litigate a lawsuit and admired Jiayu's professional style.

He Jian used his power to help Jiayu deal with the troublesome customers. Jiayu insisted on her principles and asked He Jian not to worry.

He Jian discovers a benign tumor in his lungs and wants to hand over the position of Hong Sheng's speaker to his son He Yongquan (played by Lin Jingcheng). His only opponent is Han Yaoxing, another leader in the society.The police paid close attention to the speaker election. Yongquan ignored the warning and took action. Junsen led the team to his son's birthday party...

The club prepares for the temple ceremony. Yong Quan leads his men to retrieve the dragon head stick token, but they find that the dragon head stick is missing at the meeting.Yong Quan is in urgent need of recovery, and his mistress Jenny calls to say that she has the faucet stick in her hand... After He Jian underwent the operation, he was distressed to learn that Yong Quan had caused chaos in the world.

Yong Quan becomes more and more sensitive, and even his confidants are suspicious. His subordinate Xin Zaichen escapes with a guilty conscience. Yongquan orders people to hunt him down and discovers Xin Zaichen's true identity...

Senior Superintendent Mo Zhenbang ordered Junsen and Weili to lead the team to frustrate Hong Sheng, and Yongquan hurriedly left the bar through the back door.It turns out that Yongquan went to seize Yaoxing's excuse, and the two fought fiercely, and Yongquan wanted to take Yaoxing's life...

Later, the identity of the person who stole the faucet stick was revealed... On Valentine's Day, Junsen saw people walking on the street, and he felt sad at the moment.Wei Li and Jiayu celebrated their first Valentine's Day after getting back together and enjoyed the sweet atmosphere.Guan Feng drives Ying Si for a ride, and Ying Si becomes curious about the scientific theory of love.

Guanfeng further established a relationship with Zi Le and successfully assisted the police in analyzing Zi Le's actions on the dark web, gaining the police's trust.Guanfeng lives a regular life under the influence of his father, but he also has a fun-loving side.

Wei Li proposed to Jiayu, but Jiayu admitted that she had no confidence in marriage due to her parents' relationship.Wei Li sympathizes with Jiayu, and the two decide to live together and have a trial marriage first. However, Jiayu and Hongfu have different living habits, which may lead to conflicts... Junsen investigates the group's fraud case and finds a woman's withered skeleton in a vacant village house.

The deceased woman is estimated to have been dead for about thirty years. She is suspected of being raped and murdered and her identity is unknown... Junsen found the gangster who had burglarized the village house and even found clues...

Junsen led the team to investigate the life background of the deceased Wang Shanshan and the circumstances before her disappearance; the team member's sister felt for Shanshan's life experience and redoubled her efforts in the investigation, hoping to seek justice for Shanshan...

Junsen suspected that the skeleton case was related to Ma Jiaqiang, who was paralyzed due to a traffic accident. He wanted to obtain Jiaqiang's DNA for comparison, but was firmly opposed by his aunt Ma Fenfang and niece Ma Xinyi. His sister wanted to persuade Xinyi...

After Mei Tou accidentally discovers new clues, she learns from Ying Si that Guan Feng has equipment at the university that can analyze people's brain waves and read their brain thoughts to communicate.O Ji invites Guan Feng to help and asks him to use a brain wave machine to understand the case of Xiang Jiaqiang.

Guan Feng uses the brain wave machine to ask Jia Qiang to tell the story of the past thirty years ago...

Jia Qiang comes from a prominent family, but is despised and treated coldly by his evil wife in a political marriage.Later, Ka-keung meets Shanshan, who sells investment funds by chance. The two have a crush on each other and eventually develop an extramarital affair... Fenfang guesses that Ka-keung is having an affair and orders him to break up as soon as possible.Shanshan and Jiaqiang make an appointment to meet at the village house...

Junsen is worried that Yingsi will be deceived by love and lead to misunderstandings. Yingsi hopes to maintain a "friend%" relationship with Junsen.

The police asked Guan Feng to film the live broadcast. Ying Si found out that the pre-recorded information was wrong and rushed to the scene.When Guan Feng saw Ying Si arriving in embarrassment, he didn't complain at all, and his impression of Ying Si deepened.

Cases of throwing water bottles from high altitudes occurred one after another, and the perpetrators threatened to release the prisoner in the nanny car terrorist attack case.Guan Feng was invited to analyze the murderer's tactics and help O Ji successfully solve the case.Yingsi saves the birds on the ground, and Guanfeng is even more impressed by her.

Guan Feng and Zi Le went out to play games, and the two seemed to have a tacit understanding.The police suspected that Qiao Tianzu sent a suspicious encrypted message, but found out that it was a misunderstanding.The enthusiastic Tianzu is a computer security expert, but he and the calm Guanfeng are college friends.

Wei Li was assigned to crack down on illegal activities in Hepuxia Village. Liao Qixi was determined to become the village chief and change the evil practices in the village. His wife hesitated due to gratitude, but was persuaded by Qixi's cousin Liao Bizhi to support her husband...

A real estate developer wants to acquire some land in Hepu Village for development, but it only needs the approval of Chang Bo, a villager in Xia Village.Qi Xi and En Ku tried to persuade Chang Bo but to no avail. Qi Xi once got drunk and had an emotional outburst and accidentally pushed Chang Bo to the ground...

Wei Li led a team to find Qi Xi, only to find out that Qi Xi was seriously injured and died.Qixi was accused of manslaughter, leaving the pregnant Eun to care for her young son.Bi Zhi and Tong En asked Jia Yu to help defend Qi Xi, but Jia Yu needed to avoid suspicion due to her relationship with Wei Li.

Wei Li admires the upright Qixi and is willing to withdraw from the case so that Jiayu can be Qixi's defense lawyer.Junsen took over the case on behalf of Weili. There seemed to be no room for change, but a key clue suddenly appeared...

Jiayu used new clues to defend Qixi and wanted to clear him of the charge of manslaughter... Hongfu did housework for Wei Li as usual, but he touched Jiayu's personal belongings. Jiayu was dissatisfied...

Jiayu was restrained by her opponent's barrister Du Kuangmin in a defamation case, so she asked Guanfeng to serve as an expert witness to successfully resolve the lawsuit.Junsen wanted to ask Tianzu to help unlock Zi Le's mysterious message, but Tianzu declined the invitation for his girlfriend. Junsen didn't know that his girlfriend was Zhang Xi.

Zhang Xi did not want to return to Hong Kong, but for Tianzu, he decided to muster the courage to come to Hong Kong to accompany him.Zhang Xi unexpectedly reunited with Junsen and collapsed on the spot, but Tianzu appeared in time.Zhang Xi confessed the past to Tian Zu, and Tian Zu suddenly realized why she resisted returning to Hong Kong...

Tianzu was worried about Zhang Xi and decided to ask Guanfeng to help her resolve her knot. Guanfeng even arranged for Zhang Xi to meet Yingsi...

Wei Li and Jiayu are heading towards marriage, but Junsen is still at a loss on the emotional road.Zhenbang is about to be promoted, and in a large-scale operation, he meets his old lover Lan, who has disappeared for many years.Zhenbang met Lan in private, but was discovered by others, which caused both black and white rumors. It turned out that Zhenbang and Lan had an unknown past...

More than thirty years ago, the fledgling Zhenbang lurked as an undercover agent next to the leader of the society, Hou Shiqiu. By chance, Zhenbang met Shiqiu's sister Hou Shujuan, who is now Lan...

There is a rumor in the police force that Zhen Pong failed Lan, and policewoman O was aggrieved by this. Later, she heard the police veteran tell the truth... Zhen Pong felt guilty that his undercover operation had ruined Lan's life, but it indirectly contributed to Lan's relationship with his neighbor Xu Renda.Dusk love, just when Lan was comforted by finding a good home, Renda was involved in the case...

Lan begged Zhenbang to help Renda. Zhenbang used O Ji to take over the case in public and private, but he was still helpless. Lan decided to take the blame for Renda...

Wei Li accidentally discovered that the key evidence in the case may be related to the sensational case of the King of Thieves, and tried his best to find relevant clues left by the King of Thieves in the hope of clearing Renda's suspicion...

Weili led the team to search hard and successfully found key evidence.After comparative analysis, Renda was finally dismissed from prosecution.Lan and Renda expressed their gratitude to Zhenbang, who was relieved to resolve their long-standing grievances.Tianzu mentioned to Junsen that Zhang Xi had improved greatly after receiving treatment and could safely stay in Hong Kong to handle the new work assigned by the bank.

Junsen took the opportunity to invite Tianzu to assist the police in decrypting the secret, and Tianzu readily agreed.Wei Li got Jiayu's agreement to go to Canada with him to meet his parents, but unexpectedly the plan changed...

Junsen and Yingsi returned to Hong Kong as middle school classmates and returned to the middle school campus where they fell in love. Junsen felt that Yingsi had not forgotten his love and decided to give it a try...

Tianzu assisted the police in decrypting the code and successfully found Perses, another darknet netizen of Zi Le, and found that he had obtained a large amount of cryptocurrency from Zi Le.When Zi Le and Guan Feng were playing ball, vague memories flashed...

Tianzu asked Zhang Xi to go out and track down Perses. Jun Sen and Zhang Xi put aside their grudges and became friends again. The three of them cooperated even more tacitly.Zhang Xi and Tianzu found a way to stop Perses on the dark web. The other party also discovered that they were under attack and immediately resisted, but they were always defeated.When Perses felt deeply guilty, a new turning point appeared, and it seemed that he could continue his revenge plan...

Ying Si returned to work at the CIB due to the reorganization of the police force.

Junsen and Yingsi get along well with each other in public and private, and successfully cooperate to solve the case.Thief king Shi Shaobo, who had served more than 20 years in prison, escaped from a low-security prison in the last month of his sentence, leaving the police baffled.

Ying Si discovers clues, and Wei Li leads the investigation, finally grasping Shao Bo's location. Unexpectedly, an accident occurs during the tracking, and Shao Bo successfully escapes.Wei Li was severely scolded by Zhenbang for the first time due to the failure of the pursuit. He was in a low mood, but he pretended that nothing happened and ate with Jiayu and Hongfu, causing a small disturbance.Hongfu used the wisdom of the mahjong game as a metaphor for life and encouraged Weili to believe in himself.

Wei Li decided to expand the scope of the investigation, and Yingsi also helped review intelligence from overseas...

Wei Li concluded that Shao Bo had some dealings with overseas suspects and asked Ying Si to investigate.Yingsi found clues, and Weili rushed to investigate. He heard a lot of gunshots and saw Shaobo present. Only later did he learn the real reason for Shaobo's escape...

Even though Wei Li went in the wrong direction, he finally made up for his previous mistakes.Xia Youqian claimed to be a relative of Zi Le's late wife You Li, and applied to inherit You Li's huge inheritance. However, because the documents in hand could not fully prove her relationship with You Li, the estate supervisor rejected the application.

Youqian used the media to put pressure on her, and the inheritance issue instantly became a hot topic in the city.Zhenbang was instructed by his superiors to pay attention to the incident and investigate whether Youqian had any thoughts of revenge for Youli.

Kuang Min offered to help You Qian in the lawsuit for money, and had an inseparable fight with Jia Yu in court.Youqian has a close relationship with people in the community, and O remembers to investigate her details.Youqian went to court to testify in person, bursting into tears, and gained the upper hand.

Guan Feng takes You Qian to see Zi Le, but Zi Le reacts extremely unexpectedly.Youqian proposed that as long as Wei Zhaoyang helped her obtain Youli's inheritance, she would help Zhaoyang obtain control of the Wei Feng Group, and the two decided to cooperate.

Jiayu also asked Junsen and Zhang Xi to testify. Unexpectedly, Zhang Xi was attacked by Kuang Min and had an affair with Junsen that day... Guanfeng injected new drugs into Zi Le, hoping that Zi Le's cognitive ability could be improved...

Ying Si saw Guan Feng's sad face and used a simple act to make him feel better.Seeing that Youqian's lawsuit was in good shape, Zhaoyang wanted to please her.Someone suspected Youqian's identity and later blackmailed her with anonymous messages.

Jiayu concluded that Youqian had a high chance of winning and was ready to accept defeat.In order to take Zhang Xi out of Hong Kong as soon as possible, Tianzu spent all his time decrypting the documents; Zhang Xi discovered a shocking secret in decrypting the documents, which may affect the direction of the lawsuit...

Guanfeng wants to use Youqian's help to improve Zi Le's cognitive ability.Wei Li misunderstood that Jiayu had a new love, causing a joke, but the relationship between the two took a further step.Wei Li, Jiayu and Hongfu were discussing marriage matters. Unexpectedly, Hongfu asked Jiayu to sign a prenuptial agreement...

Jiayu felt disrespected and decided to put the marriage on hold.Weili returned to the police station to complain to Junsen and asked him to tell everyone that the wedding date would be notified later.After Zhang Xi reunited with Gu Chengwu, who grew up together in a Venezuelan orphanage, his wallet was stolen by a pickpocket and he was accidentally hit by a car while chasing him.

Junsen met Chengwu in Zhang Xi's ward, but he didn't expect there was another person behind Chengwu...

Zhenbang pointed out that the police were already investigating Chengwu, and asked Junsen not to alert others, but to continue normal interactions with Chengwu.Chengwu still didn't know that the police were following him, so he continued to act as usual.Junsen suddenly learned that Zhang Xi was missing and searched for him to no avail. In desperation, he had to go to Chengwu's hotel room to inquire...

Chengwu suspected that his identity had been exposed and asked Ji to investigate and find out the truth.Junsen learned that Chengwu's boss had brought a group of killers to Hong Kong, and he was worried that Zhang Xi would be implicated.On the day of the transaction, the situation reversed. When Chengwu was about to escape, he was chased by the organization's killers.

Chengwu killed the opponent and escaped, but was hunted by the black and white.Jun Sen was ordered to investigate the incident and was about to arrest Cheng Wu when he met the killer.Forced by the situation, Junsen and Chengwu join forces...

Under You Qian's stimulation, Zi Le's cognitive ability greatly improved. After Guan Feng sent You Qian away, he successfully asked for the funds collected by Zi Le.Tianzu successfully completed the decryption and the police lowered their alert. Unexpectedly, Guanfeng had contacted the mercenary group...

Junsen was concerned about Wei Li's emotional affairs, and Wei Li admitted that he was caught between Hongfu and Jiayu, so he had to work hard to help the two get along.The police discovered that Perses was in contact with the top mercenary group on the dark web, and Junsen and Weili were appointed to join a special team to investigate the case.

Yingsi made an appointment with Zhang Xi and successfully asked Zhang Xi and Tianzu to stay and help decipher the secret.

During the group dinner, Junsen and Yingsi showed a unique tacit understanding, and Zhang Xi saw it.Zi Le wants to see You Qian, but Guan Feng refuses because he doesn't want to cause trouble.Youqian accidentally learns Guanfeng's secret and wants to find evidence to blackmail Guanfeng.Guanfeng is confident and can use his plan to resolve the crisis.Tianzu went to work in the data center, and a fire suddenly broke out!

Tianzu fell into a coma due to a rare allergic reaction.Junsen and Weili discovered that the fire alarm was suspicious and concluded that it was related to Perses and the mercenary organization.Ying Si felt very guilty and went to Zhang Xi to apologize; Zhang Xi had no intention of pursuing the matter and held Ying Si in her arms and cried bitterly. The two supported each other in the ordeal.

Guan Feng visits Tian Zu who is in a coma and admits that he has no intention of seriously injuring him...

Ying Si felt uneasy, and her mother thought it was Jun Sen and called him to blame him.Ying Si went to Jun Sen to apologize, but was comforted by him. The two got along like friends, which finally made Ying Si feel better.Zhang Xi took the initiative to apply for help in decrypting the code to help the police discover the target of the mercenary attack as early as possible...

Ying Si and Guan Feng each went to Bali to attend meetings. By chance, they went to the island where Guan Feng grew up. Guan Feng was infected by Ying Si's optimistic personality.Guanfeng confirmed from Zhang Xi that Junsen had still not given up on Yingsi, and he couldn't help but feel jealous.

Junsen met Yingsi by chance, and when driving her away, he met an old foreign woman who was injured and fell to the ground.

The two were eager to help others, but unexpectedly they became suspects in the theft case.Junsen and Yingsi were brought to the interview room for questioning by criminal investigators, and Junsen answered frankly.It turns out that Guanfeng secretly arranged the theft and used reporters to hype up the incident.The Department of Justice decided to leave it to the court and formally prosecute Junsen for theft!

Junsen was prosecuted and was to be suspended immediately.Jiayu took over the theft case and defended Junsen.Jiayu also felt embarrassed after studying the case and was not optimistic about the situation...

The case officially started trial, and Jiayu defended the case on the grounds that Junsen made a mistake while busy.Yingsi approached Guanfeng as an expert witness, and Guanfeng was willing to testify for Junsen in court, but no one thought that Guanfeng was the mastermind behind the matter.

Jun Sen's father returned to Hong Kong and silently supported him by his side.Sen's father also apologized to Ying Si for the emotional harm that Jun Sen had caused to her in the past.Guanfeng went to court to serve as an expert witness, and under Jiayu's guidance, everything went well... The trial of the lawsuit was completed, and the verdict was announced...

Yingsi visits Junsen, and the relationship between the two finally breaks through... Yingsi takes Guanfeng to the dog farm to do volunteer work. Guanfeng feels that it is very pleasant to get along with Yingsi, but this feeling conflicts with the emotional values ​​​​that he firmly believes in.

Wei Li spread the good news about Junsen and Yingsi, and everyone was happy.Hongfu decided to give up the prenuptial agreement and forced Wei Li and Jiayu to get married.When Wei Li mentioned marriage again, Jiayu's attitude seemed to soften...

After a round of turmoil, Zhang Xi discovered that data had been stolen from the police computer, and realized that the previous mercenary retreat plan was just a smoke screen.Seeing that Zi Le's cognitive ability had improved a lot, Guan Feng decided to give him the final shot...

O Ji Shazhan, the car god, accidentally learned of the suspicion of Junsen's theft case. Wei Li decided to investigate again, and Ying Si finally found the key evidence.Junsen successfully appealed and was acquitted.

Yingsi and Junsen rebuild their old friendship and cherish their time together.Junsen resumes his job and investigates Perses' real conspiracy with Wei Li; Yingsi analyzes the clues but has no clue.

Guanfeng was absent-minded and unknowingly came to the vicinity of the dog farm and met Yingsi's beloved dog Xiaobai.

When Guan Feng saw Xiao Bai falling off a cliff, he rushed to rescue him. Both humans and dogs were trapped on the mountainside.Guanfeng's plan has been launched. Junsen and Weili finally found key clues in seemingly trivial and ordinary cases. Can they prevent this terrorist attack?

Junsen and Weili rushed to the scene of the accident, but failed to evacuate the crowd. The terrorist attack had already started... Guanfeng, who was trapped on the mountainside, was rescued by an old villager. His thoughts were completely different, and he actually did something surprising...

Guanfeng later deleted all digital traces.Guanfeng and Zi Le reunite, and Zi Le's situation has improved greatly.Zi Le was injured and had an accident on the way to the hospital, so he took the opportunity to escape.You Qian devised a plan to get rid of the leader of the society, and when she was planning to escape, she saw Zi Le appear and was even taken to the underground secret room by Zi Le...

Guan Feng met the old villager who rescued him that day, and finally alerted the police. Guan Feng was even taken to the police station for questioning...

Zhang Xi learned from Guan Feng that there was an experimental new drug that might be able to treat Tian Zu. Even though there were risks involved, she believed in Guan Feng's authoritative status and decided to sign up for Tian Zu.Youqian tried her best and finally managed to escape. It turned out that there was another reason behind it...

In order to earn a fortune, You Qian told the police about Zi Le's whereabouts and suspected that Guan Feng had taken away a huge sum of money.Yingsi felt that Guanfeng still had a good side in his heart, but he had gone astray.Guanfeng realizes that he is being targeted by the police, uses cover to escape pursuit, and is later led to an abandoned church by the dog Xiaobai...

Junsen and Weili received a report to deal with a suspected bomb case on the rooftop of a building in Central, and were shocked to learn that the device was a very powerful bomb...

Junsen and Weili set up a command point, blocked off the rooftop, and allowed experts to work on the rooftop.The video of the terrorist plotter caused panic among the citizens, and the police wanted to evacuate the citizens from the area.Jiayu learned that Wei Li was in a building with a bomb, and walked towards the building regardless of the danger...

Experts worked hard to find a way to defuse the bomb on the rooftop, but the amount of radiation they received was so great that they died on the spot!

The time bomb is about to count down. Just when everyone is at a loss, Zhang Xi searches the dark web to find a way to defuse the bomb, which may prevent the bomb from exploding.Junsen and Weili learned that there was still a chance to save the entire place, so they decided to risk their lives...

The situation changes rapidly, the bomb timer keeps counting down, and every minute passes, what will be the fate of everyone?