
A charming and very daring thief known as Arsene Lupin is terrorizing the wealthy of Paris. He even goes so far as to threaten the Mona Lisa. But the police, led by the great Guerchard, think they know Arsene Lupin's identity, and they have a secret weapon to catch him.

John Barrymore
Duke of Charmerace

Lionel Barrymore
Detective Guerchard

Karen Morley
Sonia

John Miljan
Prefect of Police

Tully Marshall
Gaston Gourney-Martin

Henry Armetta
Sheriff's Man

George Davis
Sheriff's Man

John Davidson
Gourney-Martin's Butler
James T. Mack
Laurent

Mary Jane Irving
Marie

Mischa Auer
Louvre Tour Guide (uncredited)

Symona Boniface
Party Guest (uncredited)
Jack Byron
Louvre Guard (uncredited)
Jack Deery
Gendarme (uncredited)

Claire Du Brey
Mother at the Louvre (uncredited)