A martial arts comedy, vacillating between action setpieces and goofy sight gags.

Spoof of the Hong Kong Blockbuster Infernal Affairs, the film is based on a bizarre and nonsense war between the police and the triads. Lek Sir sends Keung, Yan, and Fatty undercover inside Sam's garage to get evidence of any crime Sam has committed, so Lek can win back the heart of Sam's wife Mary.

Dragon, an ex-triad member, gets out jail and decides to go straight. However, his old friend Rubbish Pool and old boss Kent usually settles disputes with other gang leaders there, so Dragon has a hard time getting pass his old ways.