A revolutionary amphibious aircraft, the Swordfish, invented by Professor Mortimer and piloted by Captain Blake, is coveted by Colonel Olrik, the Emperor's right-hand man... As the Emperor unleashes the Third World War, Olrik sets out to capture Professor Mortimer and seize the plans for his invention. With the help of Captain Blake, Mortimer succeeds, after many twists and turns, in having an armada of Swordfish built in great secrecy to destroy the Emperor's dreams of domination forever.