Mary and her friend, Rachel, are new students at St. Francis Academy, a boarding school run by the iron fist of Mother Superior. The immature teens grow bored and begin playing pranks on both the unsuspecting nuns and their unpleasant classmates, becoming a constant thorn in Mother Superior's side. However, as the years pass, Mary and Rachel slowly mature and begin to see the nuns in a different light.

Hayley Millsas Mary Clancy
June Hardingas Rachel Devery
Rosalind Russellas Mother Superior
Binnie Barnesas Sister Celestine
Camilla Sparvas Sister Constance
Mary Wickesas Sister Clarissa
Marge Redmondas Sister Liguori
Dolores Suttonas Sister Rose Marie
Margalo Gillmoreas Sister Barbara
Portia Nelsonas Sister Elizabeth
Lionel Lindon