The police detective Cheng Ye and the criminal profiler Jiang Yanbai team up due to the "Double Blossom Serial Murder Case." They move from opposition to trust, and during the investigation, they uncover the truth behind a five-year-old cold case. The real culprit turns out to be Jiang Yanbai's twin brother, Jiang Huai. The plot is tightly paced with constant twists.
