A young sailor finds himself trapped in the labyrinthine mansion of his occultist uncle, along with a number of eccentric and mysterious relatives who all seem to be harboring a dark secret.

• Artémis Productions
• Les Productions Artistes Associés
• Orson Welles
• Susan Hampshire
• Michel Bouquet
• Mathieu Carrière
• Jean-Pierre Cassel
• Daniel Pilon
• Walter Rilla
• Dora van der Groen