In 1945 the Nazis flew to the Dark Side of the Moon, and established a secret hideout, where they've been preparing for their grand return the last decades. The year is 2018, and the Americans return to the Moon in search for powerful energy source, Helium-3. They end up landing too close to the secret Nazi fortress, and although the big Nazi weapon "Götterdämmerung" is not yet ready to be deployed, soon the skies are full of iron, as the Nazi war machines take a pre-emptive move against threat from Earth.