Tang Yijie (Zhang Songwen), director of the Urban Construction Committee, fell to his death at the scene of mobilizing nail households to relocate. Young police officer Yang Jiadong (Jing Boran) was responsible for investigating the case, and thus met Tang Yijie's wife Lin Hui (Song Jia) and daughter Tang Xiaonuo (Ma Sichun). Through Tang Xiaonuo, Yang Jiadong learned that Tang Yijie and Lin Hui were not in a good relationship. Not only that, Lin Hui also suffered from schizophrenia. Tang Yijie had a close relationship with Jiang Zicheng (Qin Hao), the head of Zijin Enterprise, and Lin Hui was also Jiang Zicheng's girlfriend. In addition, Jiang Zicheng's partner Lian Ayun (Chen Yanxi) has been missing. All of this is closely related to Tang Yijie's family. Under the calculations of Lin Hui and Jiang Zicheng, Yang Jiadong not only lost his reputation but also was charged with murder and had to flee to Hong Kong, but his pursuit of the murderer did not stop.