It's 1983 and school is out. Twelve-year-old Shaun is a lonely boy growing up in a grim coastal town in northern England, whose father died fighting in the Falklands War. Over the course of the summer holiday he befriends a group of local skinheads. With his pent-up rage and frustration, Shaun finds exactly what he needs in the gang-mischief, mayhem and brotherhood. He also meets the volatile and boorish Combo, an older skinhead who sees himself in Shaun. Adopting Shaun as his protege, Combo leads the gang down a hate spewing path that culminates in an irreversible act of violence.