Twenty years after the events of Iron Sky, the former Nazi Moonbase has become the last refuge of mankind. Earth was devastated by a nuclear war, but buried deep under the wasteland lies a power that could save the last of humanity - or destroy it once and for all. The truth behind the creation of mankind will be revealed when an old enemy leads our heroes on an adventure into the Hollow Earth. To save humanity they must fight the Vril, an ancient shapeshifting reptilian race and their army of dinosaurs.

While picking his son up from college, Secret Service Agent Vic Davies finds himself in the middle of a high stakes terrorist operation and now must use his entire set of skills against the armed faction.