A dream of falling from the sky...and then birth. Rakka emerges from a large cocoon into the Old Home, welcomed by a group of female beings with small wings on their backs and shining halos above their heads. Soon, Rakka’s own wings develop, a halo is placed on her head, and she is informed that she must work in the nearby town of Grie. She quickly realizes that the town and the entire world they inhabit are confined behind the Wall, a tall, impenetrable barrier that only the mysterious Toga is allowed to cross.