Growing up in a small town in the west of Ireland in 1972 Jimmy Doyle at 16 has everything going for him, but things change quickly when his father passes away in a car accident. An excellent student and soccer player, Jimmy gets the chance to attend New Castle Prep in Portsmouth, N.H. a long way from home. Prior to leaving Jimmy is torn, learning about the details of his father Seamus' death from his grandfather Leo. The family later discovers from Leo's long time IRA compatriot that Seamus was murdered.

Jimmy settles in easily at New Castle not knowing that there has been a group of IRA members including Leo and his brother Sean planning to avenge the murder of his father up in Belfast, Northern Ireland.

While Jimmy is across the Atlantic enjoying New Castle, the IRA-led group heads north to Belfast to face Seamus' killer. The fallout from this event will help determine Jimmy's future as he leaves New Castle and attends Harvard. Determined to help find peace in Ireland, Jimmy must decide his own path forward.