A chill wind sweeps across the Bavarian Alps as Hanna Reitsch, Germany’s most famous test pilot, arrives at Hitler’s mountain retreat in Berchtesgaden. It is February 28, 1944, and the tide of World War 2 is quickly turning against the Third Reich, but now, inside the dimly lit study of the Berghof, Reitsch stands before the Führer, her eyes gleaming with determination.Reitsch gestures to blueprints spread across Hitler’s desk. The designs seem to depict a strange, tiny flying machine, completely unlike anything the Luftwaffe has deployed until now – more like a missile than an aircraft. But as Reitsch lays out her ideas, it soon becomes clear that the mission she has in mind is just as unprecedented – an extreme, almost unthinkable plan that would ask more of German aviators than ever before. At first, Hitler is taken aback; this drastic proposal is too gruesome, even for him. As Reitsch describes potential targets – Allied shipping, power plants, even Buckingham Palace – his interest grows, but he’s still not convinced; the price to pay would be too great.Yet Reitsch refuses to give up, arguing that this might be their last chance to save the Fatherland. For a long moment, silence reigns. Then, slowly, Hitler nods his assent. The Nazis are about to get to work on what will become the Fieseler Fi 103R, codenamed “Reichenberg” – their most desperate gambit yet…