The boys of Melbury Primary School are plunged into turmoil when the new French Master turns out to be a Mistress! Madelin Leforge's (the French Mistress) effect on the boys is swift and amazing. Suddenly everyone wants extra French Lessons just to glimpse the teacher in revealing shorts and bikinis. As discipline crumbles, a scandal explodes when the Head discovers the mademoiselle's mother was an old flame. Madeline must be dismissed to save further embarrassments.