The world enjoyed an era of continuing peace, but now that peace is coming to an end. Suzaku, while travelling as the masked man “Zero” with Nunnally, is defeated by a mysterious Knightmare Frame, and the pair are taken away. Kallen, Lloyd and Sayoko infiltrate Zilkhstan, the Kingdom of Warriors, where they are attacked by a mysterious Geass user. There in Zilkhstan is a person named C.C., known to the assailants as the “former master.” What are the people of Zilkhstan Palace and C.C. planning?