The story takes place in a fictional first-tier city: Mingchuan City. Many bizarre and serious cases occur frequently, the police investigation is hindered, and undercurrents from all walks of life are surging. Shen Ze'an organized a reasoning team with different backgrounds, used professional methods and unusual perspectives to help solve the case, and gradually unearthed a huge conspiracy that spanned more than ten years and involved multiple interest groups and personal grievances... Each volume focuses on one to several core cases (with main lines and branch lines). With the growth, rifts and reconciliation of the team itself, it also reveals the human nature and evil in the hidden depths of the city. The book moves forward in many threads, and finally ends with the ultimate revelation of the "Lost Case" that runs throughout the book.