An old case ten years ago touched the world of several people. Ten years passed quickly, and fate brought these people together, and they will finally solve the mystery together.

A woman fell to her death, and Xiao Yi was sentenced to death, only to find that there was a secret behind the case, which seemed to be related to the captain Lu Guoxun. In the face of various new situations, Xiao Yi and the team slowly run in, from unfamiliar to familiar, from differences to unity. At the same time, Xiao Yi also attracted the attention of another person, that is, Bai Zhe, the son of Lu Guoxun's unsolved victim. Xiao Yi found that Bai Zhe was also investigating this matter, and the means were extreme, and he tried to dissuade him many times. But Bai Zhe has always insisted on revenge in his own way.

Finally, Xiao Yi cracked this unsolved case which lasted for ten years and brought all the people involved to justice. When they thought everything was settled, they found someone else behind the scenes, and that person was beyond everyone's expectation.

The diverse plots of deep murder

1, episode 1

A female body was found in an unfinished residential building in downtown. According to the appraisal of Yao Shubei, the nature of the case is homicide. Xiao Yi, a police officer who reported in advance, explored the scene of the murder, and his seamless reasoning impressed all the policemen who participated in the investigation.

At the same time, a girl named Yang Ting committed suicide by jumping off a building in a rented house. Lu Guoxun found all kinds of doubts in the process of solving the case. He vaguely felt that there was something hidden in Yang Ting's death, so he sent his apprentice Liang Dongni to Xiao Yi on the grounds that the case was coming to an end. Xiao Yi was a little confused about Lu Xun's abnormal behavior.

2, the second episode

The body of the second victim was found in an unfinished building. After forensic identification, the killing methods were basically the same, and the case was redefined as a serial murder case. Lu Guoxun met privately with Wang Bo, an insider of the Yang Ting case. After learning that Yang Ting had watched a murder video on Ma Ye's computer, the restaurant where they met suddenly exploded.

According to the investigation, a man named Sean appeared in the sight of Xiao Yi and others. The harassed Luo Yutong was silent and seemed unwilling to report Sean's bad behavior. Luo Yutong's father, Luo Hai, intentionally or unintentionally obstructed the investigation. This series of abnormal behaviors made Xiao Yi doubt the father and daughter.