Fifteen years have passed since the death of the Demon King. The country of Sunraf has finally found peace, and its capital, the city of Bescond, has finally reemerged with the reign of humans. However, Princess Victoire "Nina" Auguste doesn't seem to really realize her relationship with the evil tyrant... Not until a strange incident awakens echoes of the past.

Will Nina be able to discover the secrets of the blood that runs through her veins and, in the process, prove that the stains of the past have nothing to do with her?