"Six months ago, an airplane carrying an atom bomb crashed while flying over the Arctic Ocean. The bomb exploded, shattering the huge ice floes and releasing from the depths, Gamera, the fabled monster who had been imprisoned in the ice for thousands of years. Gamera's first action after he was freed from his long captivity was to attack Japan. All man-made weapons proved powerless against him. There was only one last resort: the Z Plan. Gamera was jettisoned to Mars in a rocket. Again there was failure. The rocket crashed into a meteor and split open, liberating Gamera from the capsule. Gamera returned to Japan and attacked the Kurobe Dam, the largest of its kind in the entire Orient. Gamera must have a source of fuel. And so, from the power plant, he extracted electricity to store in his own body."