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Robert Castleback is in possession of secret papers which could bring a certain prince to power under conditions which would make Castleback a ruling force in Europe. Master crook Arsene Lupin becomes aware of Castleback's bid for power and, in the interests of France, begins a search for the plans.

• Charles ChristieDirector
• Scott SidneyDirector

• Wedgwood NowellArsene Lupin
• Ralph LewisRobert Castleback
• Wallace BeeryMaj. Parbury / Ribeira
• J.P. LockneyFormerie
• William V. MongChapman
• Colin KennyGerard Beaupre
• Milton RossGourel
• Thornton EdwardsDoudeville
• Frederick VroomPrefect of Police
• Mark FentonMarco
• Kathryn AdamsDolores Castleback
• Laura La PlanteGenevieve