During the Second World War there was a scientific rivalry between the two sides, who wished at all costs to be able to manufacture what would later be called the atomic bomb. One of the most important elements for the development of this definitive weapon was heavy water and the Nazis had built a factory in Telemark, from which they would manufacture large quantities of that important component.

There were only two solutions to this situation: to make the atomic bomb before the Germans, which was quite unlikely, or to sabotage the Telemark heavy water factory. The latter is the solution that has been taken. And you are going to help them.