Sakura, a child slave, was saved by Eunbi, the Crown Princess of the Tokkiz Kingdom when she was 12. Sakura was a hermaphrodite orphan and Eunbi soon discovered the child was far more than that. Sakura's past soon became the biggest mystery that Eunbi wanted to solve. On the other hand, when Eunbi was arranged to marry his First Knight, Jaeyeon, Sakura was gradually entangled in the complicated relationship between the Princess and Prince Consort.