Lili convinces her boyfriend Alex to participate in a rather special swinger evening... invitation only and orchestrated by a bourgeois couple, the nave young lovers are in for an unforgettable night. At this party, couples put their keys into a basin, and in turn each pick one out in the chance to enjoy a night with someone else. This new thrilling opportunity to exchange partners, gives Lili hope in spicing up her sex life with Alex. However during this tantalizing night, where fantasies becom...