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.
Renée Carl , René Navarre , Jean Devalde
Louis Feuillade
Gaumont ,
as Juliette Michaud
as Le détective Julien Kieffer
as Jean Brémond
Within the Woods
Font Men
Safe
The Cleaner