An autopsy was performed in the early morning and the police chief's fingerprints were embedded in the deceased's fingers - Shen Zhao's fingertips were as cold as falling into the abyss. Five years ago, he personally inspected the first corpse, but was falsely accused of tampering with the report and expelled from the police force. Now, Sergeant Qi Zheng's fingerprints have become the last relics of a serial killer. Archivist Su Rui's encrypted hard drive, deaf-mute security guard Lin Ye's sign language notes, and bedridden veteran policeman Chen Xiao's confession are all secretly piecing together a buried bloody conspiracy. When Bai Yan threw the bullet with the number engraved on it, Shen Zhao finally understood: It was not who killed the person, but the entire system that had been killing people.
