The film opens with Gamera's awakening from the accidental detonation of an atomic bomb as a result of an aerial assault by American fighters on Soviet bombers caught crossing into North American airspace. Gamera wastes no time in causing a rampage of destruction, first destroying a Japanese research ship, then making its way to Japan to wreak havoc. In an attempt to stop the giant turtle, Gamera is sedated with a freezing agent on a precipice, and powerful explosives are placed at the base. The explosion knocks the monster on its back, and while it seems as though mankind has scored a victory, this is not the case: Gamera reveals its ability to fly. A second strategy, Plan Z, is devised to stop the monster, this time by baiting it into a rocket bound for Mars. The plan is successful and the Earth is safe from Gamera
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