
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