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.
After a former elite agent rescues a 12-year-old Chinese girl who's been abducted, they find themselves in the middle of a standoff between Triads, the Russian Mafia and high-level corrupt New York City politicians and police.
The true story of Richard Kuklinski, the notorious contract killer and family man.