The Hong Kong super-cop must stop a group of blackmailing bombers at the same time that the villains of the first Police Story are out for revenge.
Chow Sing Sing is about to be kicked out of the Royal Hong Kong Police's elite Special Duties Unit. But a senior officer decides to give him one last chance: Star must go undercover as a student at the Edinburgh High School in Hong Kong to recover the senior officer's missing revolver.
Ko Chun, a renowned gambler, loses his memory in an accident and starts behaving like a child. Little Knife, an amateur gambler, offers him shelter and realizes that he has a penchant for gambling.
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