The life of a Venice sculptor (George Lazenby) is torn apart when his visiting young daughter is found murdered. But when the police are unable to find the killer, the grieving father's own investigation uncovers a high-level conspiracy of sexual perversion and violence. What depraved compulsions led to the murder of this child? And most horrifying of all, who saw her die? Adolfo Celi and Anita Strindberg costar in this film by Aldo Lado with remarkable score by Ennio Morricone.