The true story of William Lucas, one of the most remarkable spies of modern times. He succeeded in building up a network of contacts in the Europe including people near the heart of power in the Kremlin and in Nazi Germany and predicted, among other things the Hitler-Stalin pact, the outbreak of the war and the German invasion of Denmark and France. After the war, with Nazism decisively annihilated, Lucas turned his attentions, as a journalist, to warning of Soviet aims and was amongst the first to predict the Cold War. Then by 1954 he seemed to vanish and is believed to have died in 1975. Whatever, the truth, the author contends that his talent for espionage remains unparalleled.