Asprin (Mang Hoi) and Strepsil (John Shum), two petty thieves who unwittingly get involved with a murder case when they slip items owned by a murdered person. The guy had concealed an crucial microfilm within his passport, which the thieves pass on a forger friend Panadol (Tsui Hark). Inspector Ng (Michelle Yeoh) is assigned to the situation, along with Inspector Morris (Cynthia Rothrock) in Scotland Yard! The investigation leads the cops to the bumbling crooks and so on they are on Triad leader Tin's (James Tien) tail, then he'll stop at nothing to get the incriminating film straight back and with his hitman along with bodyguard (Dick Wei) in his sidehe reveals a lot for its inspectors to grab with legal ways, in frustration they offer their badges and go after reliving independently.