On the day Ji Hengxiu, the former archivist of the Qijiang City Old Case Bureau, was fired, fingerprints covered the entire city's unsolved ghost stories like a plague. The bloody handprints that appeared out of thin air in an abandoned theater, the fingerprints on the rearview mirror of a midnight bus, the complete fingerprints taken out of the throat of a drowned person... Every one of them belongs to him. The city is accusing and whispering: You are the root of all crime. After losing his official position, Ji Hengxiu made a living by mediating the repercussions of Nuo opera. Next to him was a Nuo spirit that only he could see - Nuo Jiu, wearing half a red lacquered wooden face, silently sharing every inch of his perception. The longer the sharing lasts, the faster the senses deteriorate: first the touch becomes numb, then the edges of the vision become gray, and finally even the screams turn into silent vibrations. But Ji Hengxiu discovered a secret: the essence of the ghost story is the memory of the abandoned case caused by urban indigestion. When the rules are followed, the memory goes dormant, and when the rules are broken, the case is repeated. And the curse of his fingerprints is the only key to tearing apart all the perjury - every fingerprint is a "mark of the real murderer" deliberately left by the city. When the face of Black Priestess splits into seven pieces in the mirror, and when Fei Xingtian's cycle of death traps the entire Yong'an Lane, Ji Hengxiu must use a logical closed loop to pry open the living city's mouth before he becomes blind and deaf.