It is 12 October 1984. An IRA bomb blows apart the Grand Hotel in Brighton. Miraculously, Maggie Thatcher survives. In small-town Scotland, eight-year-old Damian Barr watches in horror as his mum rips her wedding ring off and packs their bags. He knows he, too, must survive. Damian, his sister and his Catholic mum move in with her sinister new boyfriend while his Protestant dad shacks up with the glamorous Mary the Canary. Divided by sectarian suspicion, the community is held together by the sprawling Ravenscraig Steelworks.