A young reporter solves a mystery crime. The fictional reporter is Joseph Rouletabille. He works on a complex, and seemingly impossible, crime in which the criminal appears to disappear from a locked room.
Joseph Rouletabille
Professeur Stangerson
Sylvie
Father Jacques
Larsan / Ballmeyer
Arthur
Robert Darzac
Mathilde Stangerson
Julien
Secretary
Cook
Chambermaid
Marquet