In Dario Argento's horror classic jazz pianist Marcus Daly (David Hemmings) witnesses the murder of his neighbor, a psychic who had read the mind of her killer. Marcus soon teams up with a resourceful reporter (Daria Nicolodi), and the two set out to find the killer. After the professor (Glauco Mauri) Marcus called on for help turns up dead, Marcus realizes that he'll be the next to die if he can't track down the killer.