Een bekende Amerikaanse horrorschrijver gaat naar Rome om zijn laatste boek te promoten. Daar blijkt dat de gruwelijke moorden uit zijn boek één voor één worden uitgevoerd. De schrijver helpt de politie bij het onderzoek, maar raakt dieper in de zaak betrokken dan hem lief is.
| Production | Saverio Mangogna | Production Secretary |
| Crew | Enrico Lucherini | Unit Publicist |
| Production | Carlo Du Bois | Production Accountant |
| Costume & Make-Up | Diego Della Valle | Shoe Design |
| Production | Ferdinando Caputo | Production Accountant |
| Directing | Francesca Roberti | Script Supervisor |
| Editing | David Block | Colorist |
| Editing | Roberto Priori | Assistant Editor |
| Editing | Piero Bozza | Assistant Editor |
| Costume & Make-Up | Vanda Caprioli | Other |
| Costume & Make-Up | Barbara Canevari | Assistant Costume Designer |
| Camera | Giuseppe Tinelli | Camera Operator |
| Camera | Maurizio Piano | Assistant Camera |
| Camera | Mario Moreschini | Key Grip |
| Camera | Roberto Marsigli | Assistant Camera |
| Lighting | Francesco Giulivi | Gaffer |
| Camera | Remo Cartocci | Grip |
| Camera | Francesco Bellomo | Still Photographer |
| Crew | Giovanni Corridori | Special Effects |
| Sound | Romano Pampaloni | Sound Mixer |
| Sound | Giancarlo Laurenzi | Boom Operator |
| Sound | Mario Dallimonti | Sound |
| Sound | Massimo Anzellotti | Sound Effects |
| Sound | Luciano Anzellotti | Sound Effects |
| Art | Aldo Taloni | Set Dresser |
| Art | Cesare Piccini | Assistant Property Master |
| Art | Giuseppe Pagnotta | Property Master |
| Art | Osvaldo Monaco | Property Master |
| Art | Massimo Garrone | Assistant Set Decoration |
| Art | Antonella Caputo | Assistant Production Design |
| Directing | Michele Soavi | Second Assistant Director |
| Directing | Lamberto Bava | First Assistant Director |
| Production | Giuseppe Mangogna | Production Manager |
| Production | Cesare Jacolucci | Production Manager |
| Production | Cesare Jacolucci | Production Supervisor |
| Costume & Make-Up | Pierantonio Mecacci | Makeup Artist |
| Costume & Make-Up | Patrizia Corridoni | Key Hair Stylist |
| Costume & Make-Up | Franco Tomei | Costume Designer |
| Costume & Make-Up | Pierangelo Cicoletti | Costume Designer |
| Art | Maurizio Garrone | Set Decoration |
| Art | Tommaso Barbi | Set Decoration |
| Editing | Franco Fraticelli | Editor |
| Camera | Luciano Tovoli | Director of Photography |
| Sound | Claudio Simonetti | Original Music Composer |
| Sound | Fabio Pignatelli | Original Music Composer |
| Sound | Massimo Morante | Original Music Composer |
| Production | Salvatore Argento | Executive Producer |
| Production | Claudio Argento | Producer |
| Writing | Dario Argento | Story |
| Writing | Dario Argento | Screenplay |
| Directing | Dario Argento | Director |
| Art | Giuseppe Bassan | Production Design |
