1. After Liu Jiehui (Aaron Kwok) was promoted to the first brother of the police force, his wife and children were kidnapped by gangsters, and the other party asked the police to exchange Li Jiajun (Eddie Peng Yuyan Yuyan). Although he tried his best, he was finally succeeded by the other side. Li Jiajun escaped, and Liu Jiehui was questioned by the Hong Kong judicial authorities for acting without authorization in violation of police regulations. The former deputy director of the police department, who was bent on finding out who was behind the kidnapping case and resigned, was bewitched by the retired former director of police, Cai (), and chickened out during the questioning process, which triggered the impeachment crisis.

2. At the same time, Oswald Kan (Chow Yun Fat), a member of the Legislative Council, is full of doubts about Li Wenbin's defection and sends his beloved Ou Yongen to investigate his whereabouts, thus finding a connection with Li Jiajun and Cai who escaped. Ou Yongen was later discovered by Cai and his gang during the tracking process and eventually died in a car accident. Ou Yongen's death angered Oswald Kan and made him join the investigation of Li Wenbin. Through the cloud file left by Ou Yongen, Oswald Kan obtained the photos of Li Wenbin's secret meeting with Li Jiajun and Cai Yuanqi. Liu Jiehui also found Li Wenbin's eyes in the police through anti-espionage, and put up two thumbs before hiding to trace the whereabouts of Cai's disappearance. At the same time, through investigation, he found the evidence that Cai controlled the information system of the Hong Kong Police Force, and finally destroyed Cai's plot in one fell swoop. The deeper reason-the political conspiracy of the Secretary for Justice, Li Yonglian, to run for the chief executive of Hong Kong and then control the Hong Kong government, is still hidden underwater and has not been uncovered.