Eleven years have passed in reality since Gale and her comrades left for the Hidden Realm. Their once peaceful and prosperous land lies in ruins, controlled by Shinkaiyami, Yaketsukuyona and Kazir, and their imperial armies of dark and ice Descendant facsimiles. Gale and Mizu's sons, Rakurai and Arashi, live a deprived life with many other teenagers in the shattered ruins of Hikari, the City of Light, forced to risk their lives each and every day to survive amidst the ashes of yesterday.