This gory giallo film from writer-director duo Ernesto Gastaldi and Sergio Martino follows the trials of Italian writer Oliviero Rouvigny (Luigi Pistilli), who's haunted by the ghost of his mother and can't seem to start a successful career, much to the chagrin of his wife (Anita Strindberg). When Oliviero's mistress turns up dead, however, the incident kicks off a string of savage murders that drag everyone into hell.