While investigating a case, criminal police Jiang Guangming (Ma Yili) and Shi Luo (Gao Zhiting) accidentally discovered that the crime scene described in the novel by writer Gu Jiming (Tong Dawei) coincided with the crime scene they were investigating. Fiction and reality intertwined, is everything just a coincidence? The appearance of the novel also provided a new direction for the two to investigate, but at the same time it also led them to a deeper mystery...Case within case, mystery within mystery, who is the murderer hiding behind the scenes? The play is adapted from the novel of the same name by Seicho Matsumoto.