In 1945, at the end of World War II, German top scientists, under the control of Hans Kammler make a breakthrough in anti-gravity research. They launch two SS submarines to Antarctic, where they have established a secret base for studiying space traveling tehnology. From there, Nazi spaceships are sent to the "dark side" of the Moon where they establish the military base "Schwarze Sonne" ("Black Sun"). Throughout the years, the base becomes a permanent home for the Nazis who escaped the Earth, where they build a powerful fleet of war spaceships throughout the centuries, also studying Earth tehnology in the process and advancing the Nazi weapon tehnology, preparing themselves for the war.
At the early 21st century, in 2018, the descendants of the Nazis, under the control of General Klaus Adler (Götz Otto) and Lieutenant Renate Richter (Julia Dietze), are preparing a final strike to finally accomplish what their descendants unsuccessfully tried to do; Conquer the Earth once in for all. But the new President of the United States (Stephanie Paul), has plans and secret weapons to stop the invasion. With the Americans as their biggest threat, the Nazis start a siege on USA.