In the real city, Lin Zhou left the police force due to an unjust case and formed a reasoning team "Search Team". The team members each carry their own past pains and secrets, and are involved in the bizarre cases that continue to occur in the city. Each volume explores an independent or continuous mystery, with multiple story lines running concurrently, including family feuds, black industry, power struggles and social indifference. Team members gradually reveal their pasts under a common mystery, and there is an unknown force behind the case that affects everyone's fate. As the case progresses, a huge conspiracy gradually emerges. In the end, the team faces a life and death test in pursuit of justice and self-salvation.