Francis Li (Chow Yun-Fat) is about as care-free as you can get when it comes to stealing other men’s wives or eating enough cholesterol to make a regular fast food patron cringe with nausea. However, he takes his police work just as seriously as his new partner Michael Tso (Conan Lee) does, both of whom meet for the first time in bizarre circumstances. Trouble is afoot at the local Surfboard factory where the head drug-dealer has been duped out of his merchandise, but unbeknownst to him one of his men is behind the deception. This man then gets his sister Marydonna (Nina Li Chi) to deliver his package of heroin so as to see them both with enough money to last them forever. The two cops are close on her tale but they both end up losing their pants to the main suspect and only end up with Marydonna in custody. They “persuade” her that it’s in her best interest to help find her brother before he gets killed.
However, things go from bad to worse when Marydonna’s brother is finally found out by the drug-dealers and is dealt with accordingly, however the cops finally bust the head drug pusher but lose sight of his right-hand hitman (Chia Hui ‘Gordon’ Liu). Just when everything seems to be going right for once, Marydonna also gets offed by the bad boys and in the panic Francis’ sister (Shirley Ng) gets kidnapped by the hitman and his goons in exchange for the detained criminal. The ensuing battle sees Francis Li picking off each bad guy with a craftily roped-off shotgun, whilst Michael Tso saves the damsel in distress by having it out with the hitman using a couple of well-located chainsaws.