In an isolated villa, Davide Lugani lives with his wife, Carlo, his brother, and their secretary Paolo. Wheelchair-bound Carlo is blind and mute, but his abnormal sensitivity allows him to predict events before they happen. Davide dies of a suspected heart attack and Carlo's nurse is shot dead. The police suspect Davide's widow as well as Paolo, who seems to be her lover. Just as the pair are about to be arrested, there is a twist...
| Actor | Role |
|---|---|
 John Drew BarrymorePaolo Morand | Paolo Morand |
| LLuisa RivelliAnna Lugani | Anna Lugani |
 Lisa GastoniElisabeth Buckner | Elisabeth Buckner |
 Jean ClaudioDavide Lugani | Davide Lugani |
 Umberto D'OrsiCommissioner Perrotti | Commissioner Perrotti |
| PPeter DaneDr. Bowen | Dr. Bowen |
 Ombretta ColliChristine | Christine |
 Piero GerliniThe sergeant | The sergeant |
| MMichele FrancisNot listed | Not listed |
| AAldo BonamanoPicchiatore Grasso | Picchiatore Grasso |
 María BadmajewNot listed | Not listed |
 Nini RossoNot listed | Not listed |
| CClaudia YounesNot listed | Not listed |
 Sergio GibelloNot listed | Not listed |
 Elisa MainardiThe woman who sends the anonymous letter | The woman who sends the anonymous letter |