Strory by Dario Argento, Luigi Cozzi and Mario Foglietti
Starring Michael Brandon, Mimsy Farmer and Bud Spencer
A musician is stalked by an unknown killer who's blackmailing him for an accidential killing of another stalker. But is everything what it appears to be?
This was originally intended to be Argento's swan song to the giallo genre. This would later change once Le cinque giornate (Five Days of Milan) did poorly at the box-office.
Maria (Costanza Spada) meets Andrea (Stefano Satta Flores) at Piazza dei Quiriti.