A man discharged from the hospital after suffering a nervous breakdown is taken to a remote Italian villa by his strangely-behaving wife. But he has strong premonitions that the house is possessed by some force of witchcraft, which he has been experiencing in his recurring nightmare.
| Directing | Umberto Lenzi | Director |
| Writing | Gianfranco Clerici | Writer |
| Writing | Daniele Stroppa | Writer |
| Writing | Umberto Lenzi | Writer |
| Sound | Claudio Simonetti | Original Music Composer |
| Camera | Giancarlo Ferrando | Director of Photography |
| Editing | Alberto Moriani | Editor |
| Art | Franco Velchi | Production Design |
| Costume & Make-Up | Valentina Di Palma | Costume Design |
| Costume & Make-Up | Maria Teresa Carrera | Hairstylist |
| Costume & Make-Up | Giuseppe Ferranti | Makeup Artist |
| Art | Roberto Granieri | Property Master |
| Sound | Enzo Diliberto | Foley Artist |
| Sound | Giuliano Piermarioli | Sound Recordist |
| Crew | Giuseppe Ferranti | Special Effects |
| Visual Effects | Aldo Mafera | Visual Effects |
