The Sin (1972)
A strange love story between a devoted young nun and a young Marxist determined to help run the hospital wards where the nun is the head nurse.
Directed by: Alberto Lattuada
Starring: Sophia Loren, Adriano Celentano, Fernando Rey, Juan Luis Galiardo, Giuseppe Maffioli, Patrizia De Clara
Links: IMDb, Movie posters, Movie stills