Arsène Lupin seeks to steal the icon of Saint George, sparkling with diamonds. It is currently in the hands of General Krechov, a Russian émigré aristocrat who stole it himself and took it to Paris. This icon is also coveted by the Soviet government, which wants to sell it to buy wheat. Comrade Tatiana, a beautiful civil servant, is in charge of this mission. If she doesn't want to use her charms to succeed, she'll just have to hire a thief, Arsène Lupin for example! She travels to Paris, escorted by two henchmen. Lupin introduces himself to Comrade Tatiana, disguised as a proletarian.