Perhaps the greatest sin of all is making love a sin.
A young writer is invited to stay in a religious hostel run by a sinister, manipulative nun who plays deadly psychological games with the inhabitants.
Glenda Jackson
Sister Geraldine
Claudio Cassinelli
Rodolfo Solina
Lisa Harrow
Emilia Contreras
Adolfo Celi
Father Borelli
Francisco Rabal
Bishop Marquez
Duilio Del Prete
Monsignor Salvi
Arnoldo Foà
Monsignor Badensky
Gabriele Lavia
Prince Ottavio Ranieri d'Aragona
Ely Galleani
Rodolfo's Girlfriend
Margherita Horowitz
Queen Ranieri d'Aragona
Fabrizio Jovine
The Doctor
Lorenzo Terzon
Sara Sperati
Princess Alessandra Ranieri d'Aragona (as Adele Sperati)
Rolf Tasna
Monsignor Meitner
Eugenio Bottari
(as Eugenio Bottai)
Edoardo Canali
Edda Ferronao
Kitchen maid
Carla Mancini
Eleonora Morana
Sister Chiara
Nazzareno Natale
Father Monaldi
