Upananta is a fantastical world of floating islands and dragonriders. This beautiful world is on the brink of destruction. Islands are dropping out of the sky, and the evil Jairo is unstoppable. Only the great hero, Aktha, can save the world. The rookie dragonrider Thaim vows to find him, following the hero's sudden disappearance from the battlefield. Thaim's search takes him to another world: a place where flying dragons and adventure only exist in high school student Nagi's dreams. Some flashing lights sequences or patterns may affect photosensitive viewers.