Murder at 50,000 feet? Insurance investigator George Hilton must suss out whether million dollar insurance-beneficiary widow Ida Galli (billed here as Evelyn Stewart) had her husband blown sky-high mid-flight. But the payout in picturesque Greece goes violently awry, bringing new persons of interest into the frame. With Swedish giallo specialist Anita Strindberg as a reporter, and a score by frequent Martino collaborator Bruno Nicolai.