Tom Harris, spying at Churchill's behest on Germany's pre-war scientific programme, is a good man who finds himself in a bad place. A place where friend and foe, good and bad, right and wrong become hopelessly confused. But it is also a place where a genius named Zuse creates a technology of world-changing potential. The Nazis came within a whisker of having this technology, years before anyone else, and it would have won them the war. But the arrogance of the Third Reich was blind to its potential and now Harris knows that he must get Zuse's ideas into the hands of the Allies. The story of Tom Harris is a jigsaw puzzle based on facts and factual events, but also about real people and how the concept of the digital computer escaped the darkness of Nazi Germany, made the atomic bomb a reality and changed all of our lives - forever.