Joseph Goebbels is fuming. Itâs the mid-1930s and the Nazi Minister of Propaganda has a nice little racket going. He and his cohorts are allowing Jews to slip out of Germany in return for 80 percent of their assets. But longtime Nazi party member Klaus Lehmann, the Chief of the German Police, is too much of a prig to let him get away with it. And given that Lehmann was one of Hitlerâs earliest supporters, heâs virtually untouchable. In the meantime, British Intelligence is going around in circles. Someone in Germany is sending them messages in a code that hasnât been used since World War I.