That night, Gu Jin was found dead in the sea of fire. The whole city mourned, but Li Xiao didn't believe it. Three years later, a scarred ghost quietly appeared and identified the real culprit of the murder that year as Li Xiao's crony. The police are chasing him, his enemies are surrounding him, and Gu Jin holds evidence that can subvert the entire city. Li Xiao doesn't let anyone go, nor does he arrest anyone. What he wants is the truth. When the old case scrolls are reopened, every page is stained with blood, and every testimony contains lies. Gu Jin is a dead person, but he is more sane than a living person; Li Xiao is a living person, but he is crazier than a dead person. They are not partners, they are each other's blades, stabbing into the abyss, just to tear apart the truth of that night.