The film is adapted from Keigo Higashino's best-selling suspense novel "The Long Corridor". There are countless secrets hidden in the Corridor Pavilion mansion, and the desire of a desperate woman to revenge for love is being staged! A wealthy businessman passed away, and his relatives gathered in the Corridor Pavilion to wait for the distribution of billions of inheritances, and everyone had their own ulterior motives. At the critical moment, lawyer Zhou Yang came with a will and a mysterious diary, and it also involved a fire homicide that occurred a year ago. The deceased was the illegitimate son of the wealthy businessman who was living outside, and he was also the first heir to all the inheritance! The murderer seemed to be hidden among the crowd...