During the Republic of China period, a bizarre murder occurred in Beihai City. The victim, Xu Shaoqing, died of a strange cause, and local rumors spread that he was killed by an evil spirit. During the investigation, detectives Long Cong and Ma Liu targeted the pharmacist Luo Xiafei. Suddenly, the second victim appeared, temporarily clearing Luo Xiafei of suspicion. At the same time, Luo Xiafei's cousin, reporter Hua Ling, was also tracking and reporting on the case. As the murderer committed the crime for the third time, Long Cong found out that the murderer was Pei Jingzhi, a classmate of the three victims. In the process of chasing Pei Jingzhi, Long Cong and Hua Ling fell into the bizarre fantasy created by him. In the end, Ma Liu appeared to save the two, and Pei Jingzhi committed suicide out of fear of crime. When the case was about to be closed, the truth was again in doubt, and the real murderer behind the scenes might be someone else...