Dario Argento directs this horror-thriller that stars Karl Malden and James Franciscus. Malden (Franco Arno) plays a blind man who makes a living writing crossword puzzles and Franciscus (Carlo Giordani) plays a reporter. They team up to investigate the murder of a guard at a genetic research hospital. All hell breaks loose at the medical institute, as the killer goes on a killing spree to cover up the original crime. Plenty of horror, suspense and terror make this film a must see for fans of the flamboyant Italian horror director Dario Argento.
Italian master of horror Dario Argento's second directorial effort (and the centerpiece of the "animal trilogy" of giallos--or mystery/thrillers--which includes BIRD WITH THE CRYSTAL PLUMAGE and FOUR FLIES ON GREY VELVET) is a suspenseful murder mystery infused with the filmmaker's trademark graphic violence. Karl Malden stars as a blind man with a talent for solving puzzles who teams-up with reporter Carlo Giordani (James Franciscus) to launch a private investigation into a string of peculiar murders, all of which seem to involve a dubious genetic research facility. The killer soon becomes wise to the duo's plans and will do whatever it takes to stop them from reporting to the police.