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.
Serge Reggiani
as Joseph Rouletabille
Pierre Renoir
as Professeur Stangerson
Janine Darcey
as Sylvie
Arthur Devère
as Father Jacques
Marcel Herrand
as Larsan / Ballmeyer
Gaston Modot
as Arthur
Lucien Nat
as Robert Darzac
Hélène Perdrière
as Mathilde Stangerson
Fabien Loris
as Julien
Robert Le Fort
as Secretary
Germaine Michel
as Cook
Madeleine Barbulée
as Chambermaid
