An American writer in Italy witnesses a murder attempt on an art-gallery owner, and the police enlist his help to catch a serial killer. As he stays in Italy with his girlfriend, the killer begins to stalk them, making their lives increasingly precarious.

The Bird with the Crystal Plumage
An American expatriate in Rome becomes obsessed with a serial killer he witnessed committing a crime, embarking on a treacherous pursuit of the murderer and his accomplice.