Old Mother Riley is rather proud of her education - after all, she went to an approved school, but never in her wildest dreams did she ever imagine she'd rise to become the headmistress of an exclusive girls' finishing school!
However, thanks to an unexpected inheritance from a distant relative in Ireland, she and daughter Kitty find themselves the proud owners of St. Mildred's School for Young Ladies. Old Mother Riley throws herself into her new role with gusto, whether it's conducting P.E. lessons for a bevy of young beauties, shamelessly cheating at Sports Day or battling the haunted school piano!
Life is good for the old rogue from Ration Row, until a gang of unscrupulous crooks decide they want to get in on the action!