The story takes place several years after Lelouch's "Zero Requiem" plan. The world has unified around the reorganize United Federation of Nations, and has enjoyed days of continuing peace. Terrorists kidnap former princess Nunnally and Suzaku, sparking an international crisis. Kingdom of Zilkhstan is accused of orchestrating the capture. Authorities send Kallen and associates on a covert operation into the country. There, they encounter the immortal witch C.C., who is on a mission to revive Lelouch.