He Killed Someone in the Case File

In a city that is calm on the surface but crimes are frequent secretly, Zhang Yan, the criminal police officer of the Municipal Public Security Bureau, and Li Donghai, the captain of the second team who is both an alumnus and a competitor, tracked down the cases of dismemberment and reselling of cultural relics that broke out one after another. Originally they just wanted to catch the murderer, but in the end they discovered that there were many people behind these cases. Pointing to the same dark force that specializes in amplifying evil thoughts in human nature and inducing ordinary people to commit crimes; what they want to do is not just to solve one murder case after another, but to follow the chain of psychological control behind serious cases, dig out the criminal genius Cai Yonglin and his master behind the scenes, and cut off the source of "creating evil" in this city.