West Germany, a simmering cauldron of radical protests, has produced a new danger to Britain: Karfeld, menacing leader of the opposition. At the same time Leo Harting, a Second Secretary in the British Embassy, has gone missing - along with more than forty Confidential embassy files. Alan Turner of the Foreign Office must travel to Bonn to recover them, facing riots, Nazi secrets and the delicate machinations of an unstable Europe in the throes of the Cold War.