During the graduation season, several murder cases occurred in two universities in Tianning City. Under the leadership of captain Liu Rui, the criminal police team continuously investigated the murder cases and brought the murderers to justice. Murder for money, vendetta, murder for love, suicide... On the surface, the facts of the case are clear and unrelated, and the methods of committing the crime are very different. However, an inconspicuous mark, a pair of invisible big hands, a persistent and suspicious young policeman, and an experienced criminal police captain, they smelled something unusual after the cases were solved one after another. The unbearable past, broken families, young people with entangled destinies, scientific madmen, mental mysophobia, the struggle of human nature, the entanglement of good and evil, and some people come from hell.
