The year is 2041 and the Earth’s only defense against mysterious aliens is a group of six young fighter pilots, two boys and four girls, backed by an enigmatic billionaire. The kids are serious in their mission and, although their teenage antics add humor, they always end up learning the value of friendship and teamwork - especially at the end of each episode when the battle calls for them to merge their fighters and form GRAVION, the most powerful defense and attack robot on the planet!
After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire.