With the end of their schooldays in sight, Rita and Sue, two Bradford teenagers, are on the lookout for new experiences. Once or twice a week, they babysit for Bob and Michelle, a more affluent couple whose sexual problems are jeopardising their marriage. When driving the two girls home one summer’s night, Bob suggests they have sex – an idea the two are more than ready to fall in with. At first, their three-way relationship is a bit of a laugh, but parents and neighbours are quick to point the finger.