Kenny Bee works for a large Hong Kong corporation who's business practice is not exactly honorable. But he is being promoted to upper management with all its perks. Cherie Chung is a woman reporter working for Hong Kong TV station who is trying to expose the corrupt practice of the company Kenny works at. By chance they get together by being shoved into the same taxi while they're totally drunk. They again meet while grocery shopping, but they get robbed and Kenny can't go back to his home without money for the ferry. This starts a relationship between them, and from conscience, Kenny decides to expose the corruption within his company. Vivian Chow plays a secondary role as semi love triangle between Cherie and Kenny.

Scientists install a micro chip, called Black Cat, inside the brain of a violence prone girl named Catherine in an attempt to refine and control her fits of rage. Their plan is to turn her into the perfect government secret agent "killing machine".