Ash, haunted by memories of his abusive father, is living in the promonster state of Belfort with his wife; Julia, a former human who purposley monsterized herself in order to cure herself of a life-threatening disease. One day, a mysterious man appears and using a mysterious orb, not only turns Julia back into a human, but also makes her seemingly immune to anything that would turn her back. Now Ash, Julia, and their friends in Belfort must find this man so Julia could turn back into a monster girl because if they don't, Julia will die from the same disease that forced her to turn into a monster girl.