The mastermind of the SS case, Li Jiajun (Eddie Peng), plans to escape the police control and join hands with the mastermind behind the scenes to plan a bigger conspiracy. The current Commissioner of Police, Liu Jiehui (Aaron Kwok), the former Deputy Commissioner of Police, Li Wenbin (Tony Leung), and senior barrister Kan Oswald (Chow Yun-fat) are involved, and Hong Kong will face an even greater crisis...