Sam, an American writer in Rome, is the only witness to an attempted murder. He launches his own personal investigation into the serial killings.

GENRE: Drama, Thriller
MPAA RATING: No Rating
RUN TIME: 1h 38m
RELEASE DATE: December 31, 1969
STARRING: Tony Musante, Suzy Kendall, Enrico Maria Salerno, Eva Renzi, Umberto Raho
DIRECTOR(S): Dario Argento
PRODUCER(S): Salvatore Argento
WRITER(S): Fredric Brown, Dario Argento
STUDIO: