Former detective Jiang Ye has been framed as a serial killer. Using twelve long-unsolved cases, he sets a trap to force the real culprit to turn themselves in. Forensic pathologist Shen Zhao wields autopsy data like a blade, journalist Lin Xiu fans the flames of public opinion, and black-market information broker Qin Mu secretly passes along a crucial piece of evidence. Meanwhile, online blogger Su Lin cheers from the shadows, waiting for the final confrontation. When every clue points to a truth deliberately buried twenty years ago, Jiang Ye finally understands: he is not hunting the killer, but seeking atonement for his own sins.
