The film is based on the best-selling suspense novel "The Long Corridor" by Keigo Higashino. There are countless secrets hidden in the cloister pavilion mansion. After the rich merchant died of illness, a fire murder case that occurred a year ago was revealed, involving the first heir of the estate, that is, the illegitimate son of the deceased, making the distribution of the estate complicated.
Key credits listed on this page include Lai Mukuan, Keigo Higashino, Xu Luyang, Ren Suxi, Liu Mintao, Li Chuanying, Lu Fangsheng, and Hou Wenyuan.