The Heavy Water War depicts one of the most exciting stories from the World War II - the Nazis' efforts to develop an atom bomb and the Allies' desperate struggle to prevent it from happening. The series starts in Stockholm in 1933 as German scientist Werner Heisenberg is awarded the Nobel Prize in Physics, and although considered "unreliable" by the Nazis, he is allowed into the secret Nazi nuclear energy project, 'Uranverein.' Heisenberg's work reveals that the atom bomb can only be made with the use of heavy water, which could be produced in sufficient quantities by the Norsk Hydro factory in Rjukan, Norway. After Norwegian professor Leif Tronstad catches wind of Germany's interest in heavy water, he escapes to England to enlist Allied help in thwarting the plan. Despite numerous sabotage attempts by the Allies against the factory, the atomic research continues and Heisenberg brags in a speech that the Germans will soon have a bomb no larger than a pineapple that will destroy London. Featuring leading English, Norwegian and German actors, The Heavy Water War portrays real characters in this true-life story of an epic struggle, the outcome of which will determine the future of Europe.