Godzilla saves Tokyo from a flying saucer that transforms into the beast Orga.

The aftermath of the Oxygen Destroyer brings forth Destoroyah, a beast intent on killing Godzilla, who is on the verge of a nuclear meltdown.

The United Nations assembles the ultimate weapon to defeat Godzilla, while scientists discover a fresh pteranodon egg on a remote Japanese island.

The Earth is headed for disaster and when an archeological research team visits Infant Island to find out why, they discover two tiny women who reveal that the Earth is fighting back for all the harm humans have done here and sends out the evil Battra to destroy us. The Cosmos, as the girls are called, offer their help by calling Mothra to battle the creature. Unfortunately, Godzilla also appears and a three way battle begins that threatens to destroy Japan.