Wah and Kinki both working at the same department of a computer company. Both of them are not getting on very well initially, but friendship develops when they get to know each other after a while. When Wah starts to realize his emergent fondness for Kinki, his ex-girlfriend reappears and plans to gain back his affection. In addition, he notices that his ex-girlfriend arranges a guy to pair up with Kinki. At the same time, his supervisor would like to lay him off at work...

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.