Astrophysicist Dr. Allen Hynek joins a secret US Air Force program investigating UFOs. Partnered with Captain Michael Quinn, their first case is a military pilot who survived a dogfight with an alien ship.
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.
When the citizens of Lubbock, Texas witness a mysterious V-shaped craft in the night sky, Hynek and Quinn are brought in to investigate the mass sighting. Based on the Lubbock Lights case.
A bizarre UFO encounter with a commercial airliner leads Hynek and Quinn to a top-secret program involving ex-Nazi scientists in Huntsville, Alabama, which has a mysterious agenda all its own.