The story takes place in the rapidly developing coastal metropolis Jianggang. As an unsolved dismemberment case emerges, the city bureau's criminal police team, led by Lu Qinyan, unravels a complex mystery that spans ten years and involves high-level political and business leaders and underground forces. The criminal police, forensic doctors, reporters, and leaders who each carry their own pasts are involved in a web of sin that is gradually tightening. At the same time, serial cases, retrieval of old cases, and the intertwined fates of multiple characters emerge one after another in the corners of the city, exposing the secrets of human nature and sacrifice and growth under the power game. The main case has reached dead ends many times, and the truth spreads like a dark pattern. The protagonist and his party keep making choices between justice, ethics, and personal emotions. Finally, in the finale, the hidden gangster and his own loss are separated, ushering in the ultimate climax and real aftermath.