Wang So, a Goryeo prince, was born with the name, “Shine.” Shin Yul is a woman hailing from the Balhae kingdom and believed to have the powers of an oracle. A prince who suffered vile remarks because of a cursed prophecy finds himself attracted to a former princess from a fallen kingdom who faces death because of her fate to become the light of another kingdom. Their love is at a point of either shining or flaming out.