The relatives of a young rebellious hier to a fortune (Dean Reed), who spends most of his time on a yacht, try to have the kid interned as a madman, but are mysteriously killed one by one, in the family's villa. A girl (Stefania Careddu), lost at sea and saved by the young man, will also have some surprises in store… This giallo was filmed in 1969 but not released until two years later and remains extremely rare.
| Actor | Role |
|---|---|
 Stefania CaredduNot listed | Not listed |
 Dean ReedNot listed | Not listed |
| GGino LavagettoNot listed | Not listed |
 Umberto RahoNot listed | Not listed |
 Antonio SalinesNot listed | Not listed |
 Mariangela GiordanoNot listed | Not listed |
| MMagda MercataliNot listed | Not listed |
| CCarlo BosoNot listed | Not listed |
 Margherita HorowitzNot listed | Not listed |
 Catherine DiamantNot listed | Not listed |
| GGiorgio FavrettoNot listed | Not listed |
 Roy BosierNot listed | Not listed |