Arsène Lupin decides to run a detective agency in addition to being a gentleman thief. As a detective he happens to cooperate with police in order to unveil the criminal activities of a villain. When he succeeds the villain returns the favour. The unmasked Arsène Lupin manages to escape with the villain's gangster moll as his new companion.

Cast:Jules Berry, Gabriel Signoret, Suzy Prim, Rosine Deréan, Aimé Simon-Girard, Thomy Bourdelle,

Genre:Comedy, Crime, Drama,

country:France,

Production:Le Film d'art,