At the peak of World War II, Nazi Germany attempts to bolster its troops with technology developed using vampiric biology. Fearing that this advancement might shift the war's momentum in favor of the Axis, Sir Arthur Hellsing recruits his butler and soldier, Walter C. Dornez, along with the vampire Alucard, to thwart the German scheme, thrusting the two men into a conflict that will leave permanent scars on both.