The story revolves around the criminal investigation team led by criminal police captain Song Qingqian. They face a series of complicated and confusing cases, each of which challenges their wisdom and courage. As the investigation deepens, they gradually uncover the truth hidden behind the case, and also discover the complexity and darkness of human nature. While Song Qingqian was pursuing the truth, he was also constantly redeeming himself, and finally walked out of the shadow of the past and grew into a more mature criminal police officer. The appearance of Gu Yanchen brought a touch of warmth and hope to her life. They worked together to solve the case, and also developed subtle emotions unknowingly.
