Ohio State astrophysicist Dr. Allen Hynek is recruited by the Air Force into their top-secret program investigating UFOs called Project Blue Book. Partnered with Captain Michael Quinn, they investigate the case of a military pilot who survived a dogfight with an alien craft. Based on the "Gorman Dogfight" case.

Dr. Hynek and Captain Quinn investigate a West Virginia case of a woman and her two children who witnessed a flying saucer crash near their farm and an alien being emerge from the fiery wreck; based on the Flatwoods Monster case.