In Belle-Ile, twenty-year-old Greg and his boss, Michel, canvass a bar manager with an eye to selling him some alarm systems. They have no luck. Before getting the boat back to the mainland, Michel suggests that his young colleague smash a window so that they may better sell their products the following week.
Forced into it, Greg carries out his mission but must abruptly flee the scene. Then night falls and he gets lost. By chance, he winds up at the pop singer Alain Souchon’s place. Souchon invites him in and offers him something to eat.