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.

Teenage Sascha has two dreams: to write a novel about her mother and to take revenge on her step-father who brutally murdered her. When she meets the newspaper editor Volker, he invites her to come to his and his son's place. A subtle love triangle begins which helps Sascha to find her personal way of growing up.

Two couples visit a home from their past, and sexual tension brings out the worst in each other. Long-buried grudges resurface.