At the end of the Civil War, a major shipment of Union gold has been stolen and buried in the desert. Only one man knows the whereabouts of gold and the US Army sends captain Matt Martin to arrest him and come back with the gold. Martin, his prisoner and a handful of men enter Indian territory in search of the precious cargo. The Apaches, outlaws and storms will make it difficult.

During a Space Shuttle mission a satellite rams a unidentified flying object. The UFO afterwards performs an emergency landing in the deserts of Arizona. However the White House denies its existence because of the near presidential elections. The UFO is brought to the secret Hangar 18 and the accident is blamed on the incompetence of the astronauts Bancroff and Price. But the two fight against this and try to hunt down the UFO.