The story occurs at a universe where folks keep their war against the"unknown"--the enemy of humanity. Kids who've been summoned into a cold sleeping facility throughout the invasion by the"unknown" a few decades wake up out of their slumber and learn their bodies developed some supernatural powers. In order to secure the nation from the"unknown" emerging by the Tokyo bay camp, both the children wage struggles in the shield the cities of Tokyo, Kanagawa, and Chiba.