Bernard has discovered that his wife, Jacqueline, is having an affair with Robert. Being a reasonable businessman, Bernard gives Robert two options to compensate for the affair - either he will sleep with Robert's wife in order to keep things even, or he will have him killed. Robert chooses to let Bernard sleep with his wife. Scheming to woo her, Bernard arranges an evening meal with both couples present — much to the frustration of their overworked and underpaid maid, Marie-Louise. This is when the fun really begins