The bright lives of the citizens of Alzer take a turn after the discovery of sanctuaries. The aura coming from these sanctuaries is the cause of a strange illness that manifests in the living bodies nearby. It is up to the Slayers to scout these sanctuaries and kill the beasts to reduce the level of aura. The year X770 marked the birth of Eden Wolfhade a boy who would obtain a power that would change the world. Will he use this power for good or his greed.