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
as Arsene Lupin
Ralph Lewis
as Robert Castleback
Wallace Beery
as Maj. Parbury / Ribeira
J.P. Lockney
as Formerie
William V. Mong
as Chapman
Colin Kenny
as Gerard Beaupre
Milton Ross
as Gourel
Thornton Edwards
as Doudeville
Frederick Vroom
as Prefect of Police
Mark Fenton
as Marco
Kathryn Adams
as Dolores Castleback
Laura La Plante
as Genevieve
