A pair of hanged middle-aged men and women were found in Qin Li's jurisdiction.
In the process of searching for the source of the body, Qin Li unexpectedly discovered that the deceased was suspected to be the father and stepmother of his long-lost teenage playmate and encrypted friend Li Xin. At that time, Li Xin and his stepmother's daughter Li Xiang ran away from home one after another. Later, his father and stepmother also disappeared mysteriously, and the whereabouts of the family of four became a mystery.
In shock and confusion, he decided to investigate further and solve the mystery. And just as he was getting closer to the truth step by step, some insiders closely related to the case encountered unexpected events one after another. The successive cases disrupted the investigative sight and direction of the public security organs, and also brought Qin Li, who was deeply trapped in the many puzzles set up by Li Xiang and Li Xin, closer and closer to the truth.
