In a distant future, humanity dwells underground in vast caverns, ignorant of the sky and stars above. In the modest village of Jiha, Simon, a shy digger, discovers a glowing object while excavating. Enter Kamina, a spirited young man with rakish sunglasses and the fervor of a fiery sun, who befriends Simon and forms the Gurren Brigade, a small band of brothers determined to break through the cave ceiling and reach the surface, a place few believe exists. The village elder dismisses their ambition as folly and punishes the Brigade. However, when disaster strikes from the world above and the entire village is in jeopardy, it falls to Simon, Kamina, and a ...