Not So Far Fetched
The subject matter of this movie isn't as far fetched as you'd think if you believe the testimony of former military and civilian contractors that have come forward for years now. They tell of encounters with intelligently controlled craft that display characteristics well beyond current technology.
The testimony has been heard during more than one presentation at the National Press Club. After these encounters come varying degrees of threats to stay quiet, what they saw being matters of national security. What the movie shows is pretty extreme but does sound similar to what happened at Rendlesham Forrest. There are books with these incidents too. One being Disclosure: Military and Government Witnesses Reveal the Greatest Secrets in Modern History by Steven Greer which has the testimonies of over 5 dozen former military, government and civilian contractors. Another book is UFOs and Nukes Extraordinary Encounters at Nuclear Weapons Sites by Robert Hasting.
So if you are interested in the subject matter, there are 'real' stories of UFO encounters that the military hushed up. Truth is stranger than fiction? Maybe.