Set during World War II, this six part dramatization centers on Germany's secret nuclear project and the Allies' efforts to prevent Hitler from developing the atomic bomb. Woven through the thrilling drama are three storylines: the quest by ambitious German scientist Werner Heisenberg to get his hands on heavy water in order to produce a nuclear bomb for Hitler; the sabotage missions undertaken by Leif Tronstad and Norwegian and British soldiers, who risked their lives to prevent Hitler from having an atomic bomb; and the dilemmas faced by Erik Henriksen, the Managing Director of Norsk Hydro's Vemork factory, the sole producer of heavy water, that is being occupied by the Germans.