Kang Ha Neul is a persistent female detective. Her daily job is to investigate various bizarre cases.One day, she was attracted by a special car accident case.A smashed police car caught her attention, and she suspected there was some unknown secret hidden behind it.

From the maintenance technician, Kang Ha Na learned that the police car had been hit by a steel frame.This made her very confused, because ordinary vehicles would not be equipped with steel frames, only special vehicles would be installed.However, there was no military camp nearby, further confusing her and her colleagues.

In order to solve this mystery, Kang Ha Neul personally came to the scene of the car accident to investigate.She carefully investigated the situation at the scene and decided to retrieve nearby surveillance videos in the hope of finding witnesses.However, the investigation doesn't go smoothly, and she realizes that the case may not be as simple as it seems.

At the same time, Teacher Jin Dodge also discovered abnormalities in the school.He noticed that Park Shengtai and others were playing with their mobile phones in class and acting abnormally.After some investigation, he found that Park Shengtai's schoolbag contained pornographic books and photos of female classmates.This shocked Jin Dodge, and he decided to find out the truth behind it.

It turns out that all this is Gao En's conspiracy.She pretended to be a female student at the school, stuffed books, periodicals and photos into Park Shengtai's bag, and privately found the female classmate who had framed her, and threatened her not to make the same mistake again.Otherwise, she would turn her in.Go Eun's purpose is to frame Park Seung-tae and make him bear the crime.

Park Shengtai and others knew nothing about this. When they returned home from school, they were framed by members of the Blue Bird Group.They pretended to be police officers and cigarette sellers, and framed Park Shengtai and others for selling marijuana.Park Shengtai and others immediately ran away upon seeing this. They came to the woods and decided to bury all the cigarettes suspected of being marijuana.

The next day, Jin Daoqi played the video of Park Shengtai and others burying cigarettes in class.Park Shengtai and others were very nervous after seeing the video. They found Jin Daoqi and hoped that he could keep the secret.However, Jin Daoqi caught their handle and began to send his envoys to summon them.In order to keep the secret, Park Shengtai and others had to obey Jin Daoqi's mercy.

Jin Daoqi took the opportunity to blackmail Park Shengtai and others, asking them to prepare 5 million for him, otherwise he would tell the police about the matter.In order to raise the money, Park Shengtai and others found some gangsters to deal with Jin Daoqi.However, Jin Daoqi easily dealt with them and kicked Park Shengtai downstairs.

Fortunately, Jin Dodge had already made preparations. He laid a safety air mattress downstairs, so Park Shengtai was not injured.Jin Daoqi punished Park Shengtai and asked him to work part-time to make money to compensate Zhengmin for his mental losses and other expenses.It turned out that Zhengmin was a friend of Park Shengtai and others. He was greatly traumatized mentally because of the impact of this incident.

At the same time, Kang Ha Neul's investigation also made new progress.She found witnesses and successfully retrieved surveillance video.By watching the video, she discovered some suspicious clues.She realized that the car accident might be related to the Jade Bird Group, and she decided to investigate in depth.

However, at this moment, Jin Dodge suddenly fainted.Kang Ha Neul rushed him to the hospital, and the doctor told her that Kim Dodge was a veteran and that his body was covered with gunshot wounds.This shocked Kang Ha Neul, and she began to doubt the identity and motives behind Kim Dodge.

After a series of investigations and reasoning, Kang Ha Neul finally revealed the truth of the case.It turned out that Jin Dodge was one of the victims of the Blue Bird Group.He was once framed for exposing the crimes of the Blue Bird Group, and was forced to retire from the army and bear the burden of the crime.He has been looking for opportunities to clear his name and expose the crimes of the Blue Bird Group.

Park Shengtai and others became Kim Dou-chi's pawns in this case, and they were in danger because of their curiosity and gullibility.However, after experiencing various hardships, they gradually grew up and learned how to face difficulties and protect themselves.