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.

Wang Dahe, a successful man, lost everything after he was frames. He falls into depression, but still wants make up for the regrets of his youth. By drinking the regret medicine he can start his life again and again.

Coming back to her broken family, pregnant writer Huang Xiaoyu and her French husband, Benjamin, finds herself trapped between her cult brainwashed mother, Li Jiumei, and her secretly homosexual father, Huang Tao.

Criminal police Li Hongqi accompanied his girlfriend back to his hometown for the Chinese New Year, and accidentally discovered that his father-in-law was involved in this crime-related case. With a strong sense of justice, Li Hongqi decided to give up his vacation and cooperated with the local police to start an investigation.