Ashley Lancaster is the daughter of the leader of the Celestials, a powerful adventuring group known throughout the world for their heroic deeds. Upon request by Albann Ryn, Champion of the Tempest and member of the Celestials, she has taken his child, Brook Dumein-Ryn, under her wing. Brook is too much like her father, much to Ashley's dismay, but she still elects to teach this young prodigy how to hunt the monsters of the wilderness and save some lives along the way.