The story takes place in the modern city "Nanya City", where the crime rate is rising year by year and the public security situation is complicated. The private reasoning team headed by Lin Shaoming, whose members have their own specialties, has repeatedly assisted the police in overcoming difficulties. The cases have gradually escalated from domestic violence, serial murders, and financial fraud to social corruption and political shady affairs, with real interests intertwined with the darkness of human nature. Each case not only tests teamwork, but also constantly reveals the pain and secrets of each member. Friendship and suspicion, justice and compromise, passion and powerlessness make them gradually grow, but crises and betrayals also follow one after another. In the end, they rediscovered each other's trust and personal destiny while fighting against the huge darkness.
