Determined to assist her father in his research, Prim follows him as they journey toward a nearby dungeon, where an enigmatic ritual will be held. Betrayed at the last second by her sole remaining family member, it is only a young priestess' words that save her from slavery or worse. Instead of being bound to the dungeon for all eternity and abused in ways she can only imagine, Prim finds herself in the loving care of a goddess she barely knows anything about.

Before she realizes it, Prim, now Kiomi, is the lord of her very own dungeon, one that she will fill with many wonders and... foxes.