  The Ister  is a 3000km journey to the heart of Europe, from the mouth of the Danube river at the Black Sea, to its source in the German Black Forest. The film is based on the work of the most influential and controversial philosopher of the 20th century, Martin Heidegger, who swore allegiance to the National Socialists in 1933. By marrying a vast philosophical narrative with a fascinating journey up Europe s greatest waterway, the film invites the viewer to unravel the extraordinary past and future of  the West. 