When he gets separated from his unit, Laforet (Roger Van Hool) becomes a de facto deserter during 1939 fighting in the French provinces. Most of the story concerns his love affair with a local farmgirl, as he competes for her affection with a refugee from Spain. When he presses her to make a decision between them, the choice doesn't go in his favor. Soon after this he joins up with the Resistance movement.

Juin 1940. Le jeune soldat Laforêt perd malencontreusement son régiment au détour d’une route. Il tente de retrouver ses camarades, en vain. Il se met alors à errer à travers les paysages de l’Aveyron. Son vagabondage l’amène à croiser toute une galerie de personnages singuliers…