Codename ''X''

The story mainly takes place in the criminal investigation team of Xiaoting City. The cunning serial murderer is codenamed "X". He has hated drugs since he was a child because of the death of his relatives. However, he was unable to become a police officer because of his psychological problems, but he used murder to help drug addicts "escape". Lin Yan, the leader of the task force, is very interested in "X" as a professional criminal psychologist. In the pursuit after pursuit, "X" was arrested, and Lin Yan's partner Yang Chao was accidentally killed. Lin Yan took a long vacation because of excessive sadness. When he returned to work, he met the city's first new colleague whose police alias was an alphabet - "X". Concept: Taboo "love" under the law