Deep Red is a 1975 Italian thriller-horror film directed by Dario Argento. The film stars David Hemmings as Marcus Daly, a pianist who witnesses the brutal murder of a famous psychic. He teams up with a journalist named Gianna Brezzi (played by Daria Nicolodi) to investigate the crime and find the killer.
As they delve deeper into the investigation, Marcus and Gianna discover a web of dark secrets and hidden motives that lead them to suspect that the killer is someone close to them. Meanwhile, the killer is determined to eliminate anyone who might uncover the truth and keep the secret buried forever.
The film is known for its stylish visuals and innovative camera work, as well as its intense suspense and gore. It is considered a classic of Italian horror cinema and has influenced many subsequent works in the genre.