November 1944, the sky over Europe is burning. The Allies have achieved air sovereignty over almost all of Germany. The bomber squadrons are constantly flying their missions and are gradually destroying all German cities and most of the war machine of the Wehrmacht. In the German Kohnstein, in an abandoned mine in the Harz, the Germans are already working on a new V2 rocket. A retaliatory weapon that should even be able to reach the North American continent. British and Americans are now launching Operation Greyhound, a suicide mission to destroy the top-secret manufacturing facility in the Harz. Will they succeed in time?