"As a cop, he has brains, brawn, and an instinct to kill." A tough-as-nails cop teams up with an undercover agent to shut down a sinister mobster and his crew.

"Loyalty. Honor. Betrayal." A story between a mole in the police department and an undercover cop. Their objectives are the same: to find out who is the mole, and who is the cop.

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.