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.

For almost 100 year, Flame Kingdom castle and Ice Kingdom castle are in cold war. But now, since both crown prince of both castle are best friend. Both Kingdom are civil and have a harmonic live for both people from both Kingdom. But, since them are have contra element. They try to live as civil as they can. For that goal, both Kingdom make a huge place to try how to make people from both Kingdom live in peace.