Tridan Lagache, who has spent his life at Club Med changing friends every eight days, decides to change his life. 42 years on, he wants to find his childhood sweetheart, Violette. Freshly arrived in Paris, he is staying with Louis, a half-brother he never knew existed. To get rid of a troublesome Tridan, Louis begs one of his conquests, Roxane, to pass herself off as Violette, whom Tridan thinks he recognises at first sight.