Unsane

Tenebrae (also known as Tenebre) is a 1982 Italian horror thriller film written and directed by Dario Argento. The film stars Anthony Franciosa, John Saxon, and Daria Nicolodi. After having experimented with two exercises in pure supernatural horror, Suspiria (1977) and Inferno (1980), Tenebrae represented Argento's return to the giallo form, a sub-genre he had helped popularize in the 1970s. The story concerns an American writer promoting his latest murder-mystery novel in Rome, only to get embroiled in the search for a serial-killer who has apparently been inspired to kill by the novel.

With Argento's trademark visual style, linked with one of his more coherent plots, Tenebrae follows a writer who arrives to Rome only to find somebody is using his novels as the inspiration (and, occasionally, the means) of committing murder. As the death toll mounts the police are ever baffled, and the writer becomes more closely linked to the case than is comfortable.