To take down South Boston's Irish Mafia, the police send in one of their own to infiltrate the underworld, not realizing the syndicate has done likewise. While an undercover cop curries favor with the mob kingpin, a career criminal rises through the police ranks. But both sides soon discover there's a mole among them.

David Aames has it all: wealth, good looks and gorgeous women on his arm. But just as he begins falling for the warmhearted Sofia, his face is horribly disfigured in a car accident. That's just the beginning of his troubles as the lines between illusion and reality, between life and death, are blurred.