Nina lives with her family in a superb property in the French region of Landes. She loves her cousin Jean who is overprotected by his possessive mother, Eva. There is war and, after the French defeat, Jean wants to reach London.

Didier is an embarrassed lover and husband when his young mistress, whom he had just left, attempts suicide and is adopted by her family while she recovers. The situation becomes very tense when everyone (husband, wife, children and mistress) goes on vacation together. Didier asks his wife for a divorce after succumbing to his mistress again, but that's not the end of the trouble.