Under the urban night, an old unsolved case resurfaced. Female detective Huo Yiran was assigned to investigate, psychological counselor Su Wanqing was involved due to the entrustment of the victim's family in the case, and reporter Yan Zicheng followed up the report from a unique perspective. The three of them intertwined in different story lines. They each bear their own hidden pain, face unsolvable mysteries, social indifference and power entanglements, and continue to torture and grow themselves while pursuing the truth. As the investigation deepens, multiple clues reveal the complicated dark side of the city, and old cases reveal layers of new mysteries. Justice and revenge, redemption and betrayal collide repeatedly between reason and emotion, reality and psychology. In the end, the story lines converge, and when the truth emerges, it also evokes the characters' thoughts on themselves and human nature.
