For hundreds of years, the universe has been ruled by two great powers that competed with each other to expand their territory, namely the stone of darkness carried by the planet Orcus and the stone of light which is the symbol of the planet Orion. The power expansion mission eventually leads to planet earth – the final, becoming place and the seventh planet, which is the culmination of the war between the two great powers. Earth's character, which includes the compound elements of Water and Air, a marriage of strength that is rarely found on other planets, pushes Orcus to conquer it. Meanwhile, the Reagents, Edden's children (Earthlings) who had sacrificed themselves through smelting the soul core with atmospheric particles, finally continued their father's struggle to fortify Earth from the repeated invasions of Planet Orcus. His struggle is fully supported by the residents of the stone of light who are under Varro's command.