United is based on the true story of Manchester United's legendary "Busby Babes", the youngest side ever to win the Football League and the 1958 Munich Air Crash that claimed eight of the their number. The film draws on first-hand interviews with the survivors and their families to tell the inspirational story of a team and community overcoming terrible tragedy.

Taking over Leeds United, Brian Clough's abrasive approach and his clear dislike of the players' dirty style of play make it certain there is going to be friction. Glimpses of his earlier career help explain both his hostility to previous manager Don Revie and how much he is missing right-hand man Peter Taylor.