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