On the night of May 10, 1941, a Messerschmitt-110 crash-landed on a remote Scottish hillside. Its pilot was Rudolf Hess, the Deputy-Führer of the German Reich. Hess’ remarkable solo flight was immediately dismissed in both Britain and Germany as the act of a deranged mind. He was disowned by Hitler, and Churchill’s government insisted that his unexpected arrival on British soil was of no lasting consequence. Nevertheless, the mysterious circumstances of the flight, and Hess’ silence during fifty years of imprisonment, have led to endless speculation as to his true motives. Until now, no one has found the crucial pieces of evidence that prove that a small group of men within the British government and intelligence services were, in fact, conducting a brilliantly clever plot that would not only lead to Hess’ flight, but would have a decisive impact on the course of the war and the forces that shaped postwar Britain.