Tang Xiaoqi (school student, intern reporter) and Luo Yi (school student, intern editor) were accidentally caught in an infinite loop with three other boys while riding the elevator. After five people were reborn again and again, they finally solved the mystery of the cycle, found out the truth about Song Liang's fall from the building, and exposed the huge conspiracy behind the self-media reporting of fake news.

Tang Xiaoqi is an intern reporter. Luo Yi is a part-time editor of the company. Both are senior students of Lincheng University. During the May Day holiday, Tang Xiaoqi accompanied Luo Yi to the company to submit the manuscript. The two met three other boys while taking the elevator in the media building: the god of academic Qin Ze, freshman Ji Chenxi, and singer Lu Zijuan.  

When the elevator rose to the ninth floor, it suddenly stopped operating and then fell and exploded.When Tang Xiaoqi opened her eyes again, she found herself in the elevator 30 seconds ago, she quickly realized that she was trapped in an infinite loop.In order to save people and escape from the cycle, Tang Xiaoqi tried various methods, and then brought Lu Zijuan and Luo Yi into the cycle one by one.

Whenever one person enters the loop, the loop time is extended by 30 minutes, and the three try to stop the explosion.Luo Yi asked the security room staff and learned that Editor Chen had called the elevator maintenance staff the day before to check the elevator. This behavior aroused the suspicion of the two, and the three began to investigate Editor Chen.

Lu Zijuan found that Editor Chen was very suspicious. Before the elevator exploded, Editor Chen was staring at the office building while looking at the watch, as if counting down.Tang Xiaoqi was about to confront him, but she met Ji Chenxi and was accidentally injured by his basketball. Ji Chenxi was worried about Tang Xiaoqi and insisted on taking her to the infirmary. In the end, Ji Chenxi was also brought into the cycle by Tang Xiaoqi.

Tang Xiaoqi, Luo Yi and Lu Zijuan found Editor Chen and confronted him. Later, they learned that Editor Chen had received two anonymous text messages, which stated the time and location of the explosion. Tang Xiaoqi followed Editor Chen's investigation and locked the suspect on Qin Ze.

Tang Xiaoqi and Luo Yi investigated Qin Ze and learned about the unknown poverty and bitterness of this scholarly god.Tang Xiaoqi and Luo Yi found a suicide note in the conference room. After combining other clues, the two suspected that the suicide note was related to Qin Ze. They took the suicide note to the coffee shop where Qin Ze worked for a test, and then confronted him in person. Qin Ze found that Tang Xiaoqi was investigating him and couldn't help but be angry.

Qin Ze told Tang Xiaoqi and Luo Yi that the suicide note was not written by himself, but was related to his sponsor, the person whose pseudonym was Long Legs Sister.Tang Xiaoqi and others began to look for clues about their long-legged sister. During the investigation, Tang Xiaoqi discovered that Luo Yi was actually related to the suicide note.

Luo Yi explained that the handwriting on the suicide note was very similar to his, but he did not know about the long-legged sister and the suicide note.At this time, Ji Chenxi told Tang Xiaoqi that Lu Zijuan fainted.After Lu Zijuan woke up, he explained that he had confined space phobia, which was related to the case of falling from the building that he had encountered.Lu Zijuan suggested taking Qin Ze into the cycle and finding his long-legged sister through him.

Tang Xiaoqi and others successfully brought Qin Ze into the cycle.Qin Ze did not know the true identity of the sister Long Legs. When Tang Xiaoqi was investigating the identity of Qin Ze’s donor, she found some remittance information. Qin Ze found that it was a bank near the school and there was a supermarket near the bank. Several people decided to retrieve the supermarket surveillance and found the sister Long Legs.

During the surveillance, Tang Xiaoqi found that his long-legged sister was a boy, and only photographed his back. Several people followed through the bags in the man's hand and finally found Song Haomiao's family in Dongzhou Garden Community. He found that Song Haomiao jumped into the sea and committed suicide not long ago, and he was the murderer of the building fall case and the son of the deceased.

When Tang Xiaoqi and others were at a loss, Tang Xiaoqi received an anonymous email. The video in the email showed that the long-legged sister was Luo Yi. The few people were surprised, and Luo Yi chose to leave in desperation.Ji Chenxi caught up with Luo Yi, and a car rushed towards Ji Chenxi, and Luo Yi was hit to save him.

Another cycle began, and the time suddenly shortened by half an hour. After Tang Xiaoqi woke up, she rushed to the outside of the dormitory building. She saw Luo Yi waiting for her not far away. The two hugged each other tightly, and Luo Yi said that she was not a long-legged sister.Tang Xiaoqi and Qin Ze went to Dongzhou Garden to investigate. Ji Chenxi and Lu Zijuan stayed to see Luo Yi, but unexpectedly, Luo Yi ran away while they were not paying attention.

The four of them began to look for Luo Yi, and finally Tang Xiaoqi and Lu Zijuan found Luo Yi in the conference room, and Luo Yi confessed to Tang Xiaoqi.Tang Xiaoqi and Qin Ze went to Song Haomiao's house to investigate. Song's mother told them that when the fall of the building occurred, Song Haomiao had been to the scene and witnessed some of the incident. At that time, Song Liang was not harming people, but saving people.

They had wanted to retrieve the surveillance video, but were told that the surveillance video was broken.Tang Xiaoqi and Qin Ze found an unread email in Song Haomiao's mobile email. The content was about a edited video of Song Liang saving people. The truth was revealed. After seeing the video, Song's mother wanted to confront Wu Yiren, the anchor who reported the fake news.

Song's mother found Wu Yiren and took her hostage. Wu Yiren revealed that someone bribed her to ask her to report fake news. Song's mother forced her to ask who the man was. At this time, the security guard came to take Song's mother away.Tang Xiaoqi and Qin Ze suspected that when the fall of the building occurred, there was a third person at the scene, and that person was the real murderer.

The elevator was about to explode, and Qin Ze rushed to Wu Yiren's office to find clues. At this time, Tang Xiaoqi found Ji Chenxi who was attacked in the equipment room.The cycle started and the time was shortened by another half an hour.Qin Ze found two phone numbers during the last cycle. They first called to test Wu Yiren. Wu Yiren accidentally revealed that the fall of the building was related to the freshman at Lincheng University.

Tang Xiaoqi and others called again to test the truth of Tongyan, but found nothing.Wu Yiren hurriedly left the media building after revealing her flaws, and then got into a car accident.Tang Xiaoqi and others followed him to the city central hospital to investigate and found that Wu Yiren's docking person was Luo Wenli, the deputy editor-in-chief of Tongyan Truth. Then Luo Wenli was picked up by a car, and Tang Xiaoqi recorded the license plate.

After Qin Ze met Ji Chenxi's mother, he found out that the owner was Editor Chen by looking for the vehicle entry system of the media building.Qin Ze and Ji Chenxi found Editor Chen. Qin Ze questioned him about the truth about reporting fake news and covering up the real murderer. Editor Chen stammered and then hurriedly left.

Luo Yi proposed to check the driving recorder, and Qin Ze suggested to find a screwdriver to pry the car open.While Lu Zijuan and Ji Chenxi were looking for screwdrivers in the media building, Lu Zijuan was suddenly knocked out from behind in the tool room.Tang Xiaoqi and Luo Yi found him, Luo Yi went out to find Ji Chenxi, and then Tang Xiaoqi and Lu Zijuan encountered a fire in the tool room.

Another cycle started, and the time was reduced by another half an hour.Ji Chenxi said that he was hit in the last cycle and was hit.Tang Xiaoqi called Editor Chen to make a cliché, and he revealed the phone number of the borrower.Tang Xiaoqi then spoke with the car borrower, but she did not find out her identity. Ji Chenxi suggested looking for the media address book.

Ji Chenxi and Tang Xiaoqi investigated together and told her that her mother was Zhao Zhen, the editor-in-chief of Tongyan Truth. Tang Xiaoqi was shocked.Then Tang Xiaoqi decided to find clues first, and then tell Qin Ze and the others about this.Tang Xiaoqi found a video in Zhao Zhen’s QQ transmission record, which showed that Ji Chenxi was the real murderer who stole money and killed people to fall from the building.

Tang Xiaoqi was shocked, but at this time Ji Chenxi had already put sleeping pills on Tang Xiaoqi's mineral water, and Tang Xiaoqi fainted.On the other hand, Qin Ze found the media address book and found that Tang Xiaoqi was in danger.Ji Chenxi tied Tang Xiaoqi to the utility room. After Tang Xiaoqi woke up, Ji Chenxi admitted that he was the murderer.

Ji Chenxi took Tang Xiaoqi's cell phone and left.After Ji Chenxi left, Tang Xiaoqi tried her best to loosen herself, but the door was locked and she found herself in the teaching building.After some twists and turns, Luo Yi and Qin Ze rescued Tang Xiaoqi in the tutoring office building.

Tang Xiaoqi told them that Ji Chenxi was the murderer. They suspected that the real murderer of the elevator explosion might want to avenge Song Haomiao. Tang Xiaoqi and Luo Yi went to Song Haomiao's house to find clues.Tang Xiaoqi and Luo Yi discovered that Ji Chenxi and Song Haomiao had formed a band together before, and also found Song Haomiao's composition book. The two found the band's lead singer Wang Hao. Tang Xiaoqi learned that the song that was played in the elevator was written by Song Haomiao.

Tang Xiaoqi and Ji Chenxi temporarily quit, and decided to investigate the truth first and stop the cycle.Lu Zijuan discovered that Song Haomiao's song - Lolimath - was related to Beethoven's world-famous song - To Alice -, and Luo Yi's painting was also written inscribed % for Alice. Luo Yi didn't know how to explain it, so he ran away again in a hurry and accidentally dropped his phone.

Then, Tang Xiaoqi and others found on Luo Yi's mobile phone that Luo Yi was not only a long-legged sister, but also had the original music score of Lolimasi.Luo Yi returned to the studio and admitted that the oil painting - Lolimath - was painted by him, and looked at the painting and fell into memories.

Luo Yi was unable to pay the tuition because he couldn't sell his paintings and almost dropped out of school. Later, Song Haomiao fell in love with Luo Yi's paintings at first sight at the art exhibition. Then the two became friends. Song Haomiao composed the song - Lolimasi, and Luo Yi's paintings gradually became popular.Luo Yi decided to pass on this love and donate to Qin Ze in the name of his long-legged sister.

Tang Xiaoqi and others found a bomb placed in the guitar at the bottom of the elevator car, and at this time the security captain called out.Several people were locked in the security room, and then a security guard came to let them go. Tang Xiaoqi found that the man looked very familiar and suspected that Song Haomiao was not dead, and he was Song Haomiao.

The truth is revealed.Luo Yi asked Ji Chenxi to confront him on the roof. It turned out that the video of Song Liang saving someone was Luo Yi.At that time, Ji Chenxi was discovered by Finance Xiaomeng. The two chased to the top of the building. In order to regain the money, Xiaomeng almost fell from the building, she was caught by Song Liang who arrived in time. In the crisis, Ji Chenxi pushed the two off the building.

Song Liang fell on the roof of Lu Zijuan's car, and then Lu Zijuan unexpectedly saw Ji Chenxi on the roof.In order to cover up the truth, Zhao Zhen used money to seal Lu Zijuan's mouth.Song Haomiao was originally coming to deliver lunch to his father, but he witnessed Song Liang falling from the building with his own eyes. He was helpless and asked Qin Ze who entered the elevator for help, but Qin Ze rejected Song Haomiao on the grounds that something happened.

Song Haomiao accidentally learned that Luo Yi and Editor Chen were bribed, and the real murderer behind the scenes was Ji Chenxi. Then Song Haomiao launched a revenge plan in despair.Song Haomiao carried explosives to hold Ji Chenxi hostage on the roof. The police quickly surrounded him. Tang Xiaoqi rushed to the roof to report the truth of the incident and cleared Song Liang's injustice. Song Haomiao finally let go. Ji Chenxi regretted it very much and snatched the explosives and jumped down the high building.

In the last cycle, time returned to the moment when the fall of the building occurred. Ji Chenxi saved Song Liang and Xiaomeng without hesitation. When Tang Xiaoqi and others arrived at the media building, they saw Song Liang and Song Haomiao set off on their way home together, Ji Chenxi chose to call the police.