Giulia ontsnapt ternauwernood aan een moordaanslag. Maar de politie laat de buitenwereld geloven dat zij is overleden. Intussen worden andere vrouwen vermoord waarbij elke keer een zilveren sleutelhanger op de plaats van delict wordt aangetroffen. Haar vriend, teleurgesteld door het onhandige speurwerk van de politie, begint zelf een onderzoek en ontdekt wat de vrouwen met elkaar gemeen hebben.
Nee, helaas is Sette orchidee macchiate di rosso nog niet beschikbaar op Netflix in Nederland.
| Production | Renato Romano | Producer |
| Sound | Guido Ortenzi | Sound Engineer |
| Costume & Make-Up | Sergio Angeloni | Makeup Artist |
| Directing | Fulvio Barresi | Assistant Director |
| Directing | Rosaria Cilento | Continuity |
| Camera | Mario Sbrenna | Camera Operator |
| Editing | Amedeo Moriani | Assistant Editor |
| Sound | Bruno Moreal | Sound Mixer |
| Sound | Riz Ortolani | Original Music Composer |
| Production | Sergio Borelli | Production Manager |
| Sound | Renato Marinelli | Sound Effects |
| Production | Giacomo Caló Carducci | Production Designer |
| Costume & Make-Up | Giulia Mafai | Costume Designer |
| Art | Asmi Nardó | Other |
| Sound | Riz Ortolani | Conductor |
| Directing | Umberto Lenzi | Director |
| Camera | Angelo Lotti | Director of Photography |
| Editing | Eugenio Alabiso | Editor |
| Costume & Make-Up | Anna Graziosi | Hairstylist |
| Art | E. Pandolfini | Other |
| Writing | Cornell Woolrich | Novel |
| Costume & Make-Up | Silvio Laurenzi | Costume Assistant |
| Writing | Umberto Lenzi | Screenplay |
| Art | Paolo D'Orazio | Other |
| Writing | Roberto Gianviti | Screenplay |
| Writing | Umberto Lenzi | Story |
| Production | Herbert Kerz | Production Manager |
| Production | Lamberto Palmieri | Producer |
| Production | Lamberto Palmieri | Production Coordinator |
| Writing | Edgar Wallace | Story |
