Plot
Wang So was born a prince of Goryeo, but because a prophecy foretells that he will turn the country into a river of blood, he is exiled from the palace and shunned by the royal family. Having lost his place as the rightful heir to the throne, he lives an isolated life, and in Wang So's absence, his illegitimate half-brother Wang Uk makes an ambitious play for power.
Shin Yool is the princess of Later Balhae, and she narrowly escaped death as a child at the hands of her own people because of a prophecy that she is fated to become "the light of another nation". She and Wang So have a whirlwind marriage, and as husband and wife, begin to grow closer and fall in love.
