David Hemmings plays a English jazz pianist in Italy, who after a late-night set, witnesses a brutal murder and feels compelled to unravel the mystery. Considered by many to be the apex of the giallo subgenre, this is Argento in his 1970s prime, with dazzling, dizzying camerawork capturing beautifully violent - if occasionally nonsensical - set-pieces, all couched within the driving rhythms of prog-rock band Goblin (their first of numerous sonic collaborations).
