Julie Walters stars in an uplifting drama based on the true story of Marie Stubbs, a Glaswegian headmistress who turned around the fortunes of a troubled school. St George's in North West London shot to notoriety in 1995, when headmaster Philip Lawrence was fatally stabbed whilst intervening in a fight involving one of his pupils. Plagued by continuing violence and poor exam results, the school faces possible closure... until the new headmistress arrives.