A series of gruesome and elaborate murders terrify the city. The victims have all been subject to media controversy, leading the police to believe the murderer is a vigilante.
Detective Nam (Liu Shishi: Badges of Fury, Brotherhood of Blades) and forensic psychologist expert Mu (Deng Chau: The Mermaid, Duckweed, I Belong To You) discover invisible clues at the crime scenes and waste no time hunting the killer.
Meanwhile, the murderer is plotting his most disgusting act yet: live streaming an execution in which the people decide the victim’s fate. But as Mu closes in on the killer, he remains unaware that the murderer’s true motives lie in Mu’s past.