Set over four days against the backdrop of the Munich Conference of September 1938, this book follows the fortunes of two men who were friends at Oxford together in the 1920s. Hugh Legat is a rising star of the British diplomatic service, serving in 10 Downing Street as a private secretary to the Prime Minister, Neville Chamberlain. Paul von Hartmann is on the staff of the German Foreign Office - and secretly a member of the anti-Hitler resistance. They have not been in contact for more than a decade. But when Hugh flies with Chamberlain from London to Munich, and Paul travels on Hitler's train overnight from Berlin, their paths are set on a collision course - with dramatic results.