Ella, an outcast daughter of the wolf clan, is forced to marry Kain, the Silvermoon King cursed by vampire blood, in her half-sister’s place. Using her mother’s Moonlight Pendant, Ella helps Kain suppress the curse, and their marriage of convenience gradually develops into a bond built on trust and mutual devotion. When vampires attack their engagement banquet, Ella awakens her Moon Goddess bloodline and joins Kain in defeating the vampire elder Wade. In the end, after enduring the Moonlight Baptism together, they enter the sealed abyss and destroy Dracul, the vampire leader, choosing to set aside royal power and pursue freedom and a future together.
