At the end of the Great War, Arsène Lupin resumed his adventurous life. Theft of three paintings committed by an adversary leads him to the treasure of the Golden Fleece.

Arsène Lupin is extremely popular among the population, because he allows the needy to share in his acquired wealth. Before entering the service of the German Emperor Wilhelm II, he removes his vault in Alsace, steals two paintings of old masters, steals valuable gems and calls out to the police prefect to avoid his arrest. But this time he risks being seriously recognized. Lupin must once again use his fine intellect to deftly escape the situation.

1940: During the chaotic running fights of the French army the 7th company disappears - nobody knows they've been taken captive. Only their scouting patrol, three witty but lazy guys, can escape and now wanders around behind the German lines. They'd like to just stay out the fights, but a Lieutenant urges them to use a captured truck to break through to their troops.