Jiang Yanqiu, a former psychology professor, has been in seclusion for five years, but a serial murder case that perfectly recreates one of her failed cases drags her back into the abyss. Shen Zhao, the head of the criminal investigation team, doesn't believe in psychological profiling, but has no choice but to work with her. As media reporter Su Tang exposes a decades-old scandal, therapist Lin Wu quietly weaves an emotional cage, mentor Qi Heng silences witnesses behind the scenes, and genius hacker Zhou Yuan uses her theories as a weapon, every step toward solving the case becomes a slow torture of her soul. What she must expose isn't the killer's schemes, but the poem of evil she wrote with her own hands.
