Tom and Susan & James and Anita are two young married couples, whose love lives are stuck in the Saturday night duty-sex rut. But when Susan brings home a video featuring wife swapping, Tom recruits another couple from his office to take the plunge. Adjoining hotel rooms light the spark, and when Susan wears out the husband, they spend the rest of the night sharing the wife, and introduce Anita to a whole new way to play. And she never even takes off her heels!