Strange crimes occur in Thailand as the ranking for the world's best detective sees a shift. New detectives come into the picture to tackle three difficult cases.
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.
Journalist Ye Pan is looking for the truth behind a puzzling double fall. During her investigation, she reports nurse Li Yue and mother You Xi as suspects, which triggers public outcry and the situation gradually gets out of control.
