Waerfall Village is a peculiar place where certain Idols that hold very important secrets from the past are kept safe. You are a young Apprentice of the Sage Addae and the owner of D. Moon, a special grimoire that they say was found between you and your brother as children before raising you in the village. One day, D. Moon begins to react strongly near a waterfall north of the village, as if he felt a call coming from within... But that was only the beginning of an adventure.