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.

Quinn and Hynek are lead into a secret program involving the Operation Paperclip.

Quinn and Hynek follow clues that lead them to a secret group who have witnessed strange lights.

Hynek is drawn into a case from which he literally can't escape when a man arrives at Blue Book headquarters with his wife. The man claims he was abducted by aliens, and he plans to hold Hynek and Quinn hostage until he learns the truth.

Hynek and Quinn follow General Harding to Roswell, New Mexico, where an anonymous townsperson has threatened to expose evidence to the world of an extraterrestrial crash-landing six years ago.

Hynek and Quinn investigate reports of a soldier who was allegedly taken inside a flying saucer at a remote military base in Nevada, where they subsequently learn about the several reasons why the secrets contained in Area 51 should not be released.

The mysterious Man in Black kidnaps Hynek, which sends Quinn on a mission with the CIA to follow him and rescue Hynek.

Hynek and Quinn head to a Utah ranch to investigate a young family’s claims of unexplainable and dangerous phenomena.

When sensitive material is stolen from Generals Harding and Valentine, Hynek and Quinn realize that their culprit is far closer to home than they could imagine, but so is undeniable evidence of a UFO conspiracy.

When Hynek and Quinn track down a mysterious plane that has vanished in the Canadian wilderness, they must embark on a dangerous mission to recover its missing cargo.

Strange interlopers in the sky and sea, and the actions of a rogue admiral, threaten to turn a naval exercise into World War III. It's up to Hynek and Quinn to stop the rogue admiral.