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.
Arsene Lupin
Robert Castleback
Maj. Parbury / Ribeira
Formerie
Chapman
Gerard Beaupre
Gourel
Doudeville
Prefect of Police
Marco
Dolores Castleback
Genevieve
Vashti Seminoff
