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.

• Ren Suxi
• Liu Mintao
• Chuanying Li
• Lu Fangsheng
• Hou Wenyuan
• Tang Min
• Kid Young
• Wu Haochen