Young Sister Bertrille uses her ability to become airborne to help others, whether they want it or not. Although her aims are always benevolent, her means are often bemoaned by Mother Superior. The other Sisters must cope with their beloved Sister's aerodynamics and antics as she flies in and out of trouble.

Catherine lost her memory and wound up in a convent in the care of nuns. She tries to discover the terrible events which led to her condition, not realizing that she's being watched by a wealthy and powerful man who will do anything to protect his secret - a secret that only Catherine can reveal to the world.