The calm of a peaceful year is shattered when militants kidnap ex-princess Nunnally vi Britannia and Black Knight advisor Suzaku Kururugi, reigniting conflict after the death of the infamous Britannian emperor. The United Federation of Nations accuse the Kingdom of Zilkhstan of orchestrating the abductions, prompting Kallen Stadtfeld and her team to embark on a clandestine mission to investigate. Their journey through the dangerous kingdom leads them to encounter C.C, an immortal sorceress who wants to bring back the world's greatest revolutionary and restore balance to the world before catastrophe strikes.