- Run Time: 1 hr 40 min
- Rating: R
- Cast: Anthony Franciosa, John Saxon, Daria Nicolodi
- Director: Dario Argento
- Genre: Horror
Synopsis: Visiting Rome on a promotional tour for his new novel, writer Peter Neal (Anthony Franciosa) is pulled into a murder mystery as someone familiar with his work begins a series of killings. While the police look into the crimes, Neal investigates on his own, aided by his beautiful assistant, Anne (Daria Nicolodi), and a tenacious young local named Gianni (Christian Borromeo). As the murderer brutally dispatches of other victims, Neal gets closer to discovering the psychopath's identity.