After revealing his immense power, Eiko is confined to a government institution for children with extraordinary abilities. Labeled a dangerous Onabi, he faces strict isolation and punishment. As he learns to control his power, he discovers the sinister intentions behind his captivity and seeks to reclaim his freedom. Along the way, Eiko meets a soothing force in a boy named Watt and together they uncover secrets that lead to a confrontation that could change the fate of all gifted children.