The third and final episode of the series Netflix opens the door, and the golden mark cuts the planet. In the early 21st century, humans who were taken away from Earth by Godzilla sent some of them to other star systems for migration, but this plan ended in failure. Frustrated, humans returned to Earth and faced a drastic change in Earth 20,000 years later. All animals and plants have Godzilla cells, and Earth has become a "monster planet." The one who reigns here is the largest Godzilla in history, "Godzilla Earth", which is over 300 meters tall. The protagonist Haruo, who is obsessed with defeating Godzilla, meets the descendants of humans, Futua. Under the guidance of Futua's twin sisters, Maina and Miana, Haruo and others discover the wreckage of Mechagodzilla, the decisive weapon against Godzilla, which is still growing. They use the nanometal that constitutes the wreckage to activate the armed fortress city "Mechagodzilla City" and challenge "Godzilla Earth". During this battle, the rift between the Birshards, one of the alien races that had coexisted with each other before, and humans gradually surfaced. In contrast to the belief of Garg, the leader of the Birshards, that "If you want to defeat Godzilla, you must become a being that transcends 'humans'", Haruo could not give up the belief that "you cannot become a monster in order to defeat the monster, and you should defeat it as a 'human'". Finally, Haruo gave up the only chance to defeat "Godzilla Earth" and killed Garg. On the other hand, Haruo's childhood sweetheart Yuko also fell into a state of brain death due to the forced nanometallization of the human body by the Birshards. The sense of defeat and emptiness spread among humans. On the other side, the alien, the archbishop Metephis of the religious race Exif, claimed that Haruo's survival from the battle was a "miracle" and used it to increase his followers. This was to achieve the "ultimate goal" hidden by Exif. Miana and Maina were wary of such Exif. In addition, Haruo also asks himself what he should do as a "human". Soon, on the earth where no one can defeat "Godzilla Earth", "Ghidorah" covered with golden light descends, and a super-dimensional battle that shakes the earth begins. What is "Godzilla"? What should "humans" do? What is the future in Haruo's eyes? In the final chapter, everything will be clear.