When an aeroplane crashes, and its pilot is killed, Edwin Marriott, the Bishop of Cootamundra in Australia, is on hand. In England on leave, the Bishop has decided to learn how to fly, but he is not convinced that the pilot's death was accidental. In due course, naturally, he is proved right. The Bishop and Inspector Bray of Scotland Yard make an appealing pair of detectives, and ultimately a cunning criminal scheme is uncovered.