Humanity, in the distant future, dwells in vast caverns beneath the earth's surface, completely oblivious to the world above inhabited by the twinkling stars and endless sky. During an excavation in the humble community of Jiha, Simon, a timid laborer, unearths a curious glowing object. Kamina, an exuberant young man with a striking pair of sunglasses and contagious excitement, befriends Simon and forms a close-knit brotherhood, the Gurren Brigade. Together, they aspire to escape the village's confines and break through the cave ceiling, a seemingly impossible task. Despite the village chief's reluctance to entertain such lofty ambitions, the Brigade remains undeterred by their audacity. However, when a tragedy from above endangers the entire community, Simon, Kamina, Yoko, a sharpshooter, and their compact yet determined robot, Lagann, must take matters into their own hands and save the day. Their newfound alliance embarks on a journey to the world above, encountering a fierce battleground where they must fight back against the savage Beastmen to tilt the odds in humanity's favor! Rise to the skies, Gurren Lagann!