A long time ago, the world was about to end with the evil monster Abyss. However, the gods who lived on the moon reincarnated the legendary "Legend" beyond humanity and sealed Abyss with the earth. A thousand years have passed since the battle, and the sealed continent of Abyss begins to emerge. Crisis come again. At that time, an ordinary young man who lived in the remote village of Windmill Succeeded in summoning legend Jeanne d'Arc using his father's keepsake. This encounter changed the fate of the youth.