She is the most radical and controversial artist of the 20th century - Leni Riefenstahl. He is the inventor of the mountain film, camera designer and film avant-gardist of the 20s - Arnold Fanck. In May 1932, both board a ship and depart on a five-month film-making voyage to Greenland. Their mission is the first ever German-American feature film production: "SOS Eisberg". It's the hitherto riskiest and most expensive film project in history.