Frankie McGuire, one of the IRA's most lethal assassins, lures an American family into the crossfire of international terrorism. However, when Frankie is dispatched to the United States to purchase weaponry, he stays with the family of Tom O'Meara, a New York cop who is unaware of Frankie's true identity. Frankie is forced to choose between the promise of peace and a career of murder due to their unexpected connection and Tom's mounting suspicions.