A masked killer stalks an institution for mentally disturbed rich women.
Klaus Kinski
as Dr. Francis Clay
Rosalba Neri
as Anne Palmieri
Jane Garret
as Mara
Margaret Lee
as Cheryl Hume
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
Giulio Baraghini
as Policeman
Sandro Rossi
as Policeman
Ettore Geri
as Inspector
