A year has elapsed since the Black Rebellion, an unsuccessful uprising against the Holy Britannian Empire spearheaded by the masked vigilante Zero, who is now missing. Deprived of their revolutionary leader, the Black Knights—the resistance group of Area 11—prove too weak to oppose the brutality inflicted upon the Elevens by Britannia, which has intensified significantly to crush any hope of a future revolt. Lelouch Lamperouge, having lost all memory of his double life, lives peacefully alongside his friends as a high school student at Ashford Academy. His former partner C.C., unable to accept this turn of events, takes it upon herself to remind him of his past purpose, hoping that the mastermind Zero will rise once again to finish what he started.