In this prequel to the original, a bloody power struggle among the Triads coincides with the 1997 handover of Hong Kong, setting up the events of the first film.

A special agent has for 8 years been deep undercover in Asia's lucrative organized crime trade as he plays protégé to one of the key players, Banker. Now, Nick has but he has started to feel loyalty to his new environment and to the money.

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

When Ah Bu, a girl from a small fishing town in Taiwan, finds a glass bottle with a romantic message, she travels to Hong Kong to find her prince charming. As it turns out, her prince charming, Albert, happens to be gay. But all is not lost when Ah Bu meets the dashing Chi Wu. Meanwhile, Ah Bu's boyfriend from Taiwan comes looking for her, as the action and romance follow Ah Bu back to Taiwan.