Plot
A young inventor is kidnapped to force him to tell the secret of his invention, but he foils his captors thanks to a pen with invisible ink.
Trailer
Trailer's not available.
Cast
Renée Carl
Juliette Michaud
René Navarre
Le détective Julien Kieffer
Paul Manson
Emile Darbois
Jean Devalde
Jean Brémond
Fernand Herrmann
An Accomplice
