For summer vacation, Marc takes his wife Beatrix and their two children to the seaside house of his youth. The Mediterranean wind blows, the sea churns, and the heat of summer stokes their desires. Their daughter Laura, 19, has a rendezvous with her biker boyfriend, and their son Charly, 17, roams with his best friend Martin, who is in love with him. Beatrix is sensitive to the undisclosed, erotically charged atmosphere that exists between the boys and imagines that her son is gay. When Beatrix's lover Mathieu shows up, and Marc's old flame appears, complications escalate and the vacation collapses into hilarious chaos.