Reichau, a former army captain, has returned to France after serving three years in prison for his membership in the OAS (Secret Armed Organization) during the Algerian War. Affected by his background, he no longer believes in his country's beliefs. Indecisive about what to do with his life, he eventually agrees to participate in a robbery organized by Pierre, a pilot and the man who gave him up in Oran. The operation, in which a beautiful woman named Yo participates, entails stealing a bag containing 55 million francs during a Paris-Bordeaux trip...