Buxom blonde Marina Frajese Lotar and her lover are enjoying sex at their remote country villa. Both are interrupted by Sonia Bennett, a mysterious black siren who stabs Lotar's lover in the stomach. Lotar attempts a feeble escape but is held down by Bennett, who injects her with a sleep inducing drug. Lotar wakes up to find Bennett sitting next to her and they call a doctor. Thats leads to a threesome...and the doctor not being able to ejaculate is murdered!
| Actor | Role |
|---|---|
 Marina HedmanMarina | Marina |
 Sonia BennettSonia | Sonia |
 Giuseppe CuriaSabrina's Fiancé | Sabrina's Fiancé |
 Fernando ArcangeliSonia's Assistant | Sonia's Assistant |
 Paolo GramignanoMarina's Husband | Marina's Husband |
| PPeter BrownNot listed | Not listed |
 Guia Lauri FilziNot listed | Not listed |
 Sabrina MastrolorenziSabrina (uncredited) | Sabrina (uncredited) |