Profiler. After graduating from university, Fang Mu joins the police. Now he is a profiler, unraveling the most complex crimes... But one day his instincts misfire. Murderer. Student Luo Jiahai was detained for murder with extreme cruelty. The victim is a teacher who ruined the life of his beloved for the sake of her career. Fan Mu sympathizes with the criminal and even agrees to act as a witness for the defense in court. But soon the defendant daringly escapes from the detention center. Moreover, in this case, Fan Mu's friend and colleague receives very serious injuries - both physical and psychological. Psychodrama. To help a friend, the profiler agrees to participate in psychotherapeutic sessions. Their goal: healing through reliving traumatic experiences. But it turns out that such therapy attracts not only the police. A wave of murders sweeps across the city, each of which reminds Fang Mu of the culmination of a psychodramatic session. And after some time, at the scene of another murder, a hair of student Luo Jiahai is discovered...