In 1964, a patrolman on a desert stretch of highway hears an explosion. Investigating, he sees two beings standing outside an egg-shaped vehicle. As he watches in terror, the vehicle takes off with a great noise and recedes across the landscape. To find answers, the Air Force sends Project Blue Book personnel to determine what has happened. With them is consultant J. Allen Hynek, who becomes a key figure in the development of how we view UFOs.