In 2010, the Holy Empire of Britannia swiftly conquered Japan using advanced Knightmare Frames, renaming it Area 11 and suppressing its people. Amidst the oppression, Lelouch, a disguised Imperial Prince, acquires the Geass, a power granting him control over others. With aspirations to overthrow Britannia, Lelouch navigates the intricate web of rebellion, alliances, and his newfound abilities, all while hiding in plain sight as a student.