The Girl Who Knew Too Much

Mario Bava directs this classic Italian crime thriller. The film follows Nora Davis (Letícia Román), a young American woman holidaying in Rome, who believes she has witnessed a murder. Although initially no one will believe her, it appears that the crime she claims to have witnessed is similar to the work of a serial killer who was at large in the city ten years previously - The Alphabet Killer.

The killer has already worked through victims with surnames beginning with A, B and C. Does this mean Davis is now a target?