Lily and Chen move from Hong Kong to London to make their fortune.

Enterprising Lily runs her own restaurant but she fails to persuade Chen who prefers the security of a job as a waiter in Londons Chinatown.

Soho which forms the backdrop of much of the action, is Britains nerve centre for the Chinese Mafia the Triads. In the back streets and illicit gambling dens, the film gives a rare insight to the Machiavellian exchanges between rival Triad gangs. Trying to pay off his fathers gambling debts; the innocent Chen accepts money from a Triad member, only to find that he is expected to pay for it by doing a heroin run.

Terrified, he falls in with Lilys plan to move away and start up a business.

However back in Soho a high ranking Triad member is planning to overthrow his leader, and Chens unpaid debt could turn him into a pawn in a horrifying violent power struggle.