The female corpse on the bank of the river on a rainy night had a strange symbol carved on her forehead, which was exactly the same as the mark in her father's unjust case five years ago.
Rookie policewoman Lin Xia joins the investigation in order to solve the case, but she bumps into the mysterious criminal consultant Lu Chen. The blue fibers between the deceased's fingernails and the ritualized killing techniques point to the powerful Zhou Group.
When the second and third bodies appeared one after another, they discovered that this was not a copycat crime, but a serial killing spanning many years. The director exerted pressure, the evidence was destroyed, and they were pursued in the dark... Lin Xia and Lu Chen were walking in the fog, but they didn't know that they had already stepped into the chess game laid out by the murderer.
And behind that symbol, there is a dark secret that can subvert the entire city.
