A masked killer stalks an institution for mentally disturbed rich women.
Klaus Kinski
as Dr. Francis Clay
Margaret Lee
as Cheryl Hume
Rosalba Neri
as Anne Palmieri
Jane Garret
as Mara
John Karlsen
as Professor Osterman
Gioia Desideri
as Ruth
Giangiacomo Elia
as The Gardener (as John Ely)
Monica Strebel
as Nurse Helen
Fernando Cerulli
as Chaffeur
Sandro Rossi
as Policeman
Giulio Baraghini
as Policeman
Ettore Geri
as Inspector
