Doherty returns to Ireland after 15 years away to see his dying mother. She asks him to get his younger brother Billy out of the IRA and take him to London. However, McCarthy, who holds a grudge against Doherty for leaving the IRA, manipulates Billy into a meeting. Doherty takes a gun and goes to meet Billy, where McCarthy also shows up and takes Billy hostage. McCarthy's wife Rachel intervenes and shoots McCarthy, allowing Doherty to escape with Billy and Rachel back to London.