After the convent washing machine breaks down, the sisters are forced to go to a laundromat. When Sister Bertrille goes in to do the convent laundry, little does she know that Harry Madison and Eddie, a commercial producer and cameraman, are shooting a candid camera commercial for Delight laundry detergent. Sister Bertrille is using Delight, much to their pleasure. She ends up being the perfect spokesperson for the detergent. Part of the compensation for doing the commercial is a new washing machine. The Reverend Mother however refuses to let Sister Bertrille be part of a commercial, even if it does mean not getting the washing machine. It is a bit more difficult for Sister Bertrille to back out of it as she did sign the release form and Harry will not let her out of the contract. When she asks Carlos to help her get out of the contract, Carlos hatches a plan to make Sister Bertrille look crazy by having her talk about flying. She not only appears crazy, but Carlos tells Harry that ...