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 Wellesas Cassavius
Susan Hampshireas Nancy / Euryale / Alice / Nurse / Charlotte
Michel Bouquetas Charles Dideloo
Mathieu Carrièreas Jan
Jean-Pierre Casselas Lampernisse
Daniel Pilonas Mathias Crook
Walter Rillaas Eisengott
Dora van der Groenas Sylvie Dideloo
Charles Janssensas Philarette
Sylvie Vartanas Bets
Gerry Fisher