This is the world where the women will transform to a Yong (Dragon) and the man will be the Yong Ju (Diviner), they have to make a contract to each other.Yong Yeon, a girl who is just waiting for the day when she will transform to a dragon in a peaceful nation called Yuju Nation. One day while her beloved country being fall apart she encounter her awakening.On the verge of her death, she make a contract with a man and she is able sustain her life.Yong Yeon who pledge to be the most powerful dragon and get her revengeAnd, the inscrutable man with the goal of holding the world in his hand, Cheon Young.What will happen to their relationship?