Nobel Prize winning German scientist, Werner Heisenberg, is aiding the Nazis' efforts to develop an atom bomb using 'heavy water' from a factory deep in the Norwegian mountains. Desperate to crush Hitler's catastrophic goal, The Allies plan and mount a series of daring sabotage missions to blow up the plant before the Germans can create their potentially devastating nuclear weapon, an enterprise fraught with many dilemmas and epic challenges, the outcome of which will determine the future of democracy itself.Leading English, Norwegian and German actors portray the real-life characters and heroes of one of the most exciting stories from the Second World War, dramatised over six parts.