Su Rui, an intern detective from the Municipal Criminal Investigation Detachment, encountered a difficult serial case when he participated in a major case for the first time - three victims died mysteriously in different buildings, with almost no traces left at the scene. At the critical moment, Su Rui's "detail magnifying glass" ability awakened, and key clues were discovered from a deformed screw and an abnormal crack in the wall. Senior criminal police captain Lu Tingyuan was dubious about this newcomer at first, but he was gradually impressed by her observation skills and courage during case breakthroughs, and the two formed a partnership to investigate in depth. The highly intelligent criminal Chen Yan set up traps step by step, using construction traps and psychological games to provoke the police. Su Rui and Lu Tingyuan shuttled on the edge of danger, not only to solve the mystery of the case, but also to resist the criminal's psychological attacks. In the life-and-death battles, the relationship between the two gradually warmed up, and they finally joined forces to catch the real murderer. Su Rui also transformed from a trainee criminal policeman into an outstanding criminal policeman in his own right.
