Discover the secret origin of Warrior Woman, the greatest Nazi nemesis of them all!

Hitler and Master Man gloat over the captured Invaders and explain how they improved the Nazi Super-Soldier Serum since Master Man's initial defeat. Meanwhile, the spy that captured Private White interrogates him and with the aid of hypnosis makes him give up a secret ingredient of the American Super-Soldier Serum, Potassium. She completes the formula with the intention to use it on herself, hoping to prove her worth as a warrior to the führer, who doesn't believe in women in combat roles. When Hauptman Schneider tries to stop her, she attacks him and causes the experiment to explode in the struggle, losing the formula but imbuing her with its power nonetheless. The explosion gives the Invaders a chance to escape and attempt to capture Hitler, but the combined might of Master Man and the newly created Warrior Woman quickly defeats them again.