Grey Area

On July 4 1947 a mysterious object crash lands in the desert near Roswell, New Mexico. The Pentagon sends Rear Admiral Killenhoetter to Walker Air Force Base to investigate, where he is faced with many questions and few answers:
What was the object that crash landed that night?
Why were two mystery patients, called Greys, flown to Wright Field Air Force base?
Why were they then taken to an underground city near Washington DC?
What secret and bizarre experiments did the Tall Greys carry out under the top-secret Dulce Base?
Who was the mysterious Commander X?
Why were the army engineers digging tunnels under Navajo sacred land?
Who or what lived in the tunnels under Archeluta Mesa?
What did the test pilot shoot down and why did he have to face a martial?
The Admiral treads a dangerous path and finds the answers are tied to the covert JASON group, who have done a secret deal with the Tall Greys, But what does this deal entail?