This story is the tale of two brothers: one a successful counterfeiter and the younger a fledgling graduate of the HK police academy. The plot revolves around the split when the younger brother learns the other is a criminal and the efforts of the criminal brother to reform. Along the way are plenty of heists, double-crosses, and shoot outs.

Months after the events of the original film, Ming suspects a police superintendent as being a new mole for the triads, while years earlier, Yan embarks on his first mission.