Bernard is planning a romantic weekend with his Parisian mistress, while his wife, Jacqueline is away. He has arranged for a cook to prepare gourmet delights and has invited his best friend Robert along as alibi. What could possibly go wrong? Well…. suppose Robert turns up, not realising why he’s been invited. Suppose Jacqueline and Robert are secret lovers and she’s determined not to leave for the weekend. Suppose the cook has to pretend to be the mistress and the mistress is unable to cook. Suppose everyone’s alibi gets confused with everyone else’s. An evening of hilarious confusion ensues.