As far as 15000 years ago, the highly intelligent Gosmo people on Earth were destroyed by two large insect-type monsters, Mosra and Batra. However, after a mountain collapse, the Mosra Dome buried underground was unearthed on the present-day Yifang Island in Japan. Then three of the most powerful monsters in history-Godzilla, Mosra and Batra-met each other. Although Mosra and Batra worked together to seal Godzilla in the sea, the human crisis was not solved because a super-giant meteorite will hit the earth.