In the early hours of October 12, 1984, a bomb went off in the Grand Hotel in Brighton, where the Conservative Party's annual conference was being held. This documentary charts the events leading up to the IRA attack, which was intended to kill Prime Minister Margaret Thatcher and her Cabinet, hearing from Thatcher's private secretary Robin Butler, minister Norman Tebbit, whose wife was severely injured by the blast, and author Michael Dobbs, then a government adviser. There are also contributions by local journalists and rescue workers.