[Machine Translation] Director/Screenplay: Dario Argento / Cinematography: Vittorio Storaro / Music: Ennio Morricone / Cast: Tony Musante, Eva Renzi, Susie Kendall / Based on Fredric Brown's "The Street Devil. Argento's directorial debut, the film shines with its unique visual aesthetic and tense storytelling. It is characterized by particularly shocking visuals and innovative camerawork, and had a profound influence on later Jarreau films. --American writer Sam Dalmas is in Rome when he accidentally witnesses an attempted murder in a gallery. He is caught up in a mysterious series of murders, and decides not to return home, but instead attempts to unravel the truth using the "birdsong" he overheard at the scene as a clue. The film includes the original trailer.