Long before man there were Stone Guardians, a race of immortal warriors who sat beside Goddess. Isobel is different, she is an illegal bound servant. Not human or Guardian, she is vampire. Last of her kind, kept hidden by her Guardian master Vilem of the Obsidian Clan. Youngest son to Ivy who is responsible for the uprising that tore the Stone Guardians into two factions. One who still worship the Goddess, and the other who defies her.