Diamante, an actress engaged in the filming of a drama, is shot down in a warehouse used to store the cinema "pizzas". Another actress, Ely, get a glimpse of the corpse, which however is immediately disappears.

Peter Goodrich, an English antique dealer visiting Naples for a pleasure trip, meets the beautiful Lisa Carter by chance and begins seeing her until the woman disappears.

The young British archaeologist Tim Frazer is visited by an old friend: Henry Denston. At an agreed appointment, however, the man does not show up, giving rise to a mysterious investigation.

Michele, a young mathematics professor, moves into a new flat. Lonely, depressed, and neurotic, he spends his free time spying on his neighbors, particularly a young couple struggling with the routines of married life. When Bianca, a new teacher at the local high school, enters his life, Michele finds himself falling in love. At the same time, a string of murders rocks the neighborhood, casting suspicion on him.