50 rifles have been stolen from a US army base in Northern Ireland. Billy Boyle's uncle, Ike Eisenhower, sends him to recover the weapons, which he fears will be used in a German-sponsored IRA uprising. Bodies soon begin to accumulate, as Billy finds unexpected challenges to his Boston-Irish upbringing and IRA sympathies. There are rogues on both sides - can Billy Boyle succeed in his mission to keep this disputed conflict zone neutral?