Alan and Wendy Barnet are stuck in a marital rut and decide to answer an ad they find in a Swinging (sexual practice) magazine. The couple meets with Jack and Louise Bauer at the Zebra Lounge. The Bauers are a pair of experienced swingers who help the Barnets fulfill their sexual fantasies. However, Alan and Wendy soon realize that the Bauers are not who they seem to be.