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.
Orson Welles , Jean-Pierre Cassel , Walter Rilla , Mathieu Carrière , Michel Bouquet , Johnny Hallyday , Susan Hampshire , Daniel Pilon , Dora van der Groen , Robert Lussac , Charles Janssens , 11 more , Ward de Ravet , Sylvie Vartan , Cara Van Wersch , Gella Allaert , Jet Naessens , Marc Didden , Fanny Winkler , Mariette Van Arkkels , Cyriel Van Gent , Rosemarie Bergmans ,
