Harvey Keitel stars as a FBI agent in this dark and death-filled tale of gangs in London. The premise is a simple one: the older, established mobsters have a code of honor and try to do things the proper way. The rash, up and coming punks care nothing for honor and just want quick cash and drugs. In this case, it's an American - Carl Frazer (Viggo Mortensen) who is causing the trouble. The FBI has sent John Harris (Keitel) to help the London police force to shut him down. Carl is a truly psychotic drug / arms dealer who loves to gather up lost but innocent young men and turn them into cold blooded killers.