In a world where the Empire of Brittania conquers Japan, renaming it Area 11 and its people the 11s, a former Brittanian resident, Lelouch, promises his friend Suzaku to dismantle the oppressive regime. Years later, Lelouch, now a high school student, indulges in chess and gambling rather than attending classes. During a chance encounter with 11s terrorists, he gains a mystical power from a captured girl that enables him to control others. Using this newfound ability, Lelouch commands the rebels to thwart the advancing Brittania forces, with Suzaku, his friend turned adversary, piloting the formidable Knightmare frame Lancelot for the Empire. Adopting the guise of Zero, the enigmatic leader, Lelouch orchestrates a rebellion against Brittania, setting the stage for a gripping conflict.