In a tranquil northeastern town of Lanhe, a vicious crime unfolds, claiming three lives in vastly different ways. Captain Guan Yu of the Lanhe Police Force swiftly launches an investigation. Suspects emerge one by one: Yang Si, just released from prison two months ago. Yang Xuesong, stepson deeply entangled with two of the deceased; Wang Ping, ex-wife of Yan Hongqiao, and even a mysterious man long declared dead in the records....

A group of filmmakers are gathered in a dark and windy night for preparation of shooting a film based on a sensational murder case. It's unrealized that they are placed in the real crime scene and the true murderer is among them....

Lu Xiao is the captain of Haigang Police, who is wise and calm. He is considered the elite of the police force despite his young age, as he has solved multiple difficult cases. However, he was stumped by a bizarre case of a floating corpse, and the "Water Ghost" killer. In the process of investigation, the killer was able to escape multiple times with his extraordinary observational skills. Together with his new roommate Fang Yi Tong, the two team up to catch the killer. However, he also loses his beloved wife, Jiang Yi Ran in the process and was almost at the brink of giving up. With his teammates' encouragement, Lu Xiao picks himself up and finally catches the killer, returning justice to the victims....