Annabelle Fritton moves from to St Trinian’s school at her father's request, where she joins a group of schoolgirls to make cheap vodka for Flash Harry. When Education Minister Geoffrey Thwaites comes to St Trinian's to watch a hockey game, he discovers the illegal vodka-making business and the school is on the verge of bankrupcy due to the big penalty, which makes the girls to implement a robbery to save it.