Project Blue Book is based on the true, top-secret investigations into Unidentified Flying Objects (UFOs) and related phenomena conducted by the United States Air Force from 1952 to 1969.

Dr. J. Allen Hynek, a brilliant yet underappreciated college professor, is recruited by the U.S. Air Force to spearhead a clandestine operation called Project Blue Book. Along with his partner, the debonair Air Force Captain Michael Quinn, he is summoned to investigate UFO sightings around the country and use science to discover what really happened. However, when some encounters cannot be explained away and cases remain open, Hynek begins to suspect that he has been duped by the government into a larger conspiracy to cover up the truth.