QX21 the Last Electric Boat

In 1943, after Black May, the German submarine force was almost penetrated by the Allied anti-submarine system. A Type XXI electric boat that should not have appeared in advance was secretly pushed into the dock. An unusually stable battery system, an electronic control device that no one can understand, and a silent, handsome, and complex engineer onboard the boat. Captain Croner soon discovered that this boat was more than just a new weapon. Like a ghost, it passed through the Bay of Biscay, Brest, Lorient, the Norwegian coast, and finally disappeared from the European charts. And the people on the boat slowly realized: The Allies might not be the only ones really hunting them. This is not the story of a submarine that changed warfare. This is the story of it and the people on the boat, refusing to continue to finish the script for others.