"La Porta sul Buio" - an original television series by the renowned Italian director Dario Argento. Having gained worldwide fame for his bloody giallo films, the thriller-maker conquers television by creating an anthology series in the best traditions of "The Twilight Zone" and Alfred Hitchcock's shows. The season consists of four episodes, which are not connected to each other in terms of plot. The first episode tells the story of a young couple who are convinced that their neighbor is a murderer. The second episode is dedicated to a brutal murder on a tram. The third episode follows a patient who escaped from a psychiatric hospital, while the fourth episode features a young woman who becomes a witness to a murder but cannot prove it.