A man is stabbed on a train, leading the police to question Nicole (giallo queen Nieves Navarro) about diamonds that are missing. Her life turns upside down, as she begins to receive disguised phone calls asking about the diamonds and a blue-eyed masked man attacks her in her boudoir. She then remembers that her jealous lover Michel owns contact lenses in that color, so she runs away with an older eye surgeon to the coast of England. But Michel isn’t far behind…

The first of three giallo directed by Navarro’s husband, Luciano Ercoli, this is what the genre should be: shocking, lurid, bloody and oh so fashionable. It also makes a deft turn from what we expect from the form into an actual mystery film.

There’s a plot twist here that honestly shocked me, so I won’t spoil it. While the other two films in the Ercoli giallo trilogy — Death Walks at Midnight and The Forbidden Photos of a Lady Above Suspicion — are much better, this is still a quality film worthy of your time. Some critics decry them as Ercoli making movies just to feature his wife, but if you had a quality woman like Navarro in your life, I bet you’d do the same.

Want to see it for yourself? It’s on Shudder along with plenty of other great giallo films!