 St. Francis Academy for Girls used to be a quiet sedate convent school - quiet and sedate, that is, until it was invaded by its newest pupil, Mary Clancy. Mary is a hellion who s youthful spirits keep Mother Superior in a constant state of panic as she and her friend, Rachel Devery, substitute bubble bath for the nun s sugar, smoke cigars in the boiler room, and attempt to make a life-mask of the face of a fellow student with quick-hardening plaster. Through it all, Mother Superior is determined to salvage something of worth from the youthful clay.