Psycho killer Nanni Vitali (a riveting Helmut Berger) busts out of the joint with three henchmen and hunts down cop Giulio Santini (Richard Harrison), the man who put him away. Vitali's brutal revenge also includes raping and kidnapping a beautiful woman (Marisa Mell) in cahoots with the police. Quentin Tarantino used clips of writer-director Sergio Grieco's electrifying, ultraviolent 1977 crime drama in Jackie Brown.