Various undesirables and hippie drifters are invited to the luxury, ultra-modern country home of Dr. Antonio and his wife; when they begin to vanish, it becomes clear that something sinister — and deadly — is afoot.
| Actor | Role |
|---|---|
 Marina MalfattiNina Genovese | Nina Genovese |
 Enzo TarascioDr. Antonio Genovese | Dr. Antonio Genovese |
 George WillingMax | Max |
 Daniela CaroliMax's Companion | Max's Companion |
 Claudio BiavaAlfiero, Nina's brother | Alfiero, Nina's brother |
 Dominique BoscheroValentina, the Prostitute | Valentina, the Prostitute |
 Lucio DallaThe Tramp | The Tramp |
 Nino CastelnuovoUNESCO agent | UNESCO agent |
 Barbara MarzanoBeniamina, the Gypsy | Beniamina, the Gypsy |