The story revolves around Gu Yanshu, a doctor of criminal psychology. She is invited to serve as a consultant to the police force and assists the criminal investigation team leader Lu Yuchuan in solving a series of bizarre cases. As the investigation deepened, Gu Yanshu gradually discovered that these cases were inextricably linked, and the truth was far more complicated than she imagined. In the process of pursuing the truth, Gu Yanshu not only had to face cunning criminals, but also had to overcome her inner fear and trauma. She developed a deep relationship with Lu Yuchuan during their cooperation, but the relationship between them also faced many tests. In the end, Gu Yanshu relied on her wisdom and courage to uncover the truth hidden in the darkness and completed her own redemption.
