In a college, three friends form a secret society. Their objective - going to America. One night, after one of their secret meetings, one of them sees a man coming out from a wall. The next day, after he talks about it, he disappears. Then, the second one vanishes. Are they gone to their dreams? That's when the art teacher is murdered. Suspicions now are too high so the third one decides to investigate.
Erich von Stroheim
as Walter, le professeur d'anglais
Michel Simon
as Lemel, le professeur de dessin
Armand Bernard
as Mazeau, le concierge
Serge Grave
as Beaume
Marcel Mouloudji
as Macroy
Robert Le Vigan
as l'homme «invisible»
Aimé Clariond
as le directeur
Jean Claudio
as Mathieu Sorgue
Jean Buquet
as La Mouche
Robert Rollis
as Un élève
Félix Claude
as Un élève
Claude Roy
as le petit garçon à la tortue
