Having fortuitously discovered a photograph in which Marthe embraces someone unknown, Étienne Dorsay becomes jealous and imagines various stratagems to identify the lover. In the meantime, he and his friends acquire a weekend house for a very low price.
Etienne Dorsay
Daniel
Simon Messina, doctor
Boulifet, aka 'Bouly'
Marthe Dorsay, Étienne's wife
Mouchy Messina, Simon's possessive mother
Bernadette, designer collaborating with Étienne
Josy, Lucien's girlfriend
Marie-Ange, Bouly's ex-wife
Daisy, Bouly's fiancée
Delphine, Étienne's younger daughter
Madame Chalamand, Simon's lover
Stéphanie, Étienne's older daughter
Bully
Banoît, Marthe's lover
Bastien, stage director
Marie-Christine Bosquet, Daniel's director
Lucien
Mireille, Simon's girlfriend
Taxi driver
Bouly's secretary
Skinny colleague / Waiter (uncredited)
Violinist at Mouchy's party (uncredited)
Radio news host (voice) (uncredited)
