At the pinnacle of World War II, the Third Reich strives to augment their troops with technology infused with the principles of vampiric biology. In apprehension of the potential of this technology to shift the war's balance in favor of the Axis, Sir Arthur Hellsing enrolls his assistant and warrior Walter C. Dornez alongside vampire Alucard to thwart the German conspiracy, plunging the pair into a battle that will leave a lasting mark on their souls.