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.
Wedgwood Nowell
Arsene Lupin
Ralph Lewis
Robert Castleback
Wallace Beery
Maj. Parbury / Ribeira
J.P. Lockney
Formerie
William V. Mong
Chapman
Colin Kenny
Gerard Beaupre
Milton Ross
Gourel
Thornton Edwards
Doudeville
Frederick Vroom
Prefect of Police
Mark Fenton
Marco