In the near future, children with supernatural powers begin to appear and in order to prepare them for the upcoming battle against the "Enemies of Humanity", they are sent by the government to a preparation school located on a distant island. One day, a new student named Nana Hiragi arrives at school and soon becomes close with the other students. Little is known to the students about the true nature of the Enemies of Humanity and Nana's real reason for joining the school.
