Somewhere beyond the ends of the world is a hell. But there is no devil, demons, or boiling pots there. In this world they reeducate sinners, maintaining the fragile balance of justice. In this world no one does evil for they know it will backfire. However, this balance collapses in one day when a wall of black smoke covering the ground rises, taking away everything people have. Those who make it through the border of darkness lose their memory. Sages have interpreted a prophecy saying that darkness has come for a yet unborn princess, and the princess is the only one who can defeat the threat. The king decides to save his daughter by sending her off to another world until she comes of age. As the princess comes back, the king realizes the price of his mistake and finds out what has more power, the heritage of the ancestors or growing up outside of family.