Strange events are happening near the Great-Eyry, in the western part of the State of North Carolina: appearances of a mysterious ship, both as a high-speed vehicle on land, as a ship or even a flying ship. The sterile efforts of the police to stop it to question its inventor and thus to know the means by which it has achieved such an advance, induce the US government to send its best investigator, John Strock, to discover the mystery of the phenomenon .