In the peaceful city of Ping'an, Tang Yi is a calm and wise criminal policeman, while Lin Qing is a thoughtful forensic doctor. A bizarre case of mutilation of corpses broke the peace. The corpse was thrown by a remote river. The method was cruel and ritualistic. Tang Yi was in charge of the front-line investigation, while Lin Qing was looking for clues on the autopsy table. During their cooperation, the two discovered that the corpse dismemberment case was vaguely related to an unsolved case many years ago, and there seemed to be a pair of black hands behind it. Can they uncover the truth behind the beginning of this crime?
Purpose: justice