After years of undermining the Nazi regime and aiding the resistance, Abwehr Chief Wilhelm Canaris finally loses his battle with Heinrich Himmler and the SS. The Abwehr Trojan Horse is no more, and German intelligence is at death's door at the most crucial moment.

Stauffenberg, Olbricht and the plotters launch Operation Valkyrie. The army moves in to seize power, troops surround the government quarter in Berlin, and Joseph Goebbels is arrested. But things start going wrong pretty much immediately and far away in East Prussia the Nazi fightback begins.