

"THE PERFECT CRIME, almost! Murder to cover a jewel-theft...exposed by G-Men Guns!"
A woman and a man vying for a woman's affection: the usual love trio? Not quite so since the belle in question is Lorraine de Grissac, a very wealthy and alluring society woman, while one of the two rivals is none other than Arsène Lupin, the notorious jewel thief everybody thought dead, now living under the assumed name of René Farrand. As for the other suitor he is an American, a former F.B.I. sleuth turned private eye by the name of Steve Emerson. Steve not only suspects Farrand of being Lupin but when someone attempts to steal a precious emerald necklace from Lorraine's uncle, Count de Brissac, he is persuaded Lupin is the culprit. Is Emerson right or wrong? Which of the two men will win over Lorraine's heart?
Rene Farrand aka Arsene Lupin

Lorraine de Grissac

Steve Emerson

Count de Grissac

Joe Doyle

Georges Bouchet

Alf

Prefect of Police

Duval

Ivan Pavloff

A. Le Marchand - Detective (as Ien Wulf)

Monelle

F.B.I. Special Agent

Guard at Dock (uncredited)

Detective (uncredited)

Detective (uncredited)

Party Guest (uncredited)
Squad Car Driver (uncredited)

Vasseur (uncredited)

Hotel Assistant Manager (uncredited)

Reporter (uncredited)

Detective Alois (uncredited)

François - Butler (uncredited)
Woman Passenger at Dock (uncredited)
Gendarme (uncredited)

Man in Hotel Lobby (uncredited)

André - Horse Groom (uncredited)

Detective (uncredited)

Truck Driver (uncredited)

'Butch' Harron - Gang Leader (uncredited)

Telephone Operator (uncredited)
Plainclothes Detective (uncredited)

Fingerprint Man (uncredited)
Bill Watkins - Criminologist (uncredited)

Inspector Hennessey (uncredited)

Switchboard Operator (uncredited)

English Eddie (uncredited)

Detective (uncredited)

Party Guest (uncredited)
Sergeant (uncredited)

Man at Hotel Desk (uncredited)
Hotel Manager (uncredited)

Gendarme (uncredited)
Reporter (uncredited)

Gendarme (uncredited)
Telephone Operator (uncredited)

Burly Detective (uncredited)

Man Leaving Hotel (uncredited)

Reporter (uncredited)

Gendarme (uncredited)
Mr. Carter (uncredited)

Radio Broadcaster (voice) (uncredited)