As it turns out, the Godzilla killed by the Oxygen Destroyer was not the only one of its kind. Soon another Godzilla appears, this time called Gigantis. Gigantis appears along with another monster, Anguirus. Gigantis and Angirus appear in Osaka, where they begin a battle. After a long and hard fight, Gigantis kills Anguirus and proceeds to wreck the city. Soon the humans come up with a plan to get rid of the monster …