In the royal palace, there is an untold secret: the presence of “the child of dragon” who can foresee the future king. Seoha is brought to the palace, not knowing that she herself is born as the child of dragon. Confined in the palace for a long time, she fears her own ability. But contrary to her docile, obedient look, she is the type of person who moves forward without looking back once she is determined to do something. She can even risk her own life for what she has longed for all her life.

Lee Woo, the prince of Muheon, is an unfortunate prince who is a direct heir to the throne but had to fake his death and run away when falsely accused of murdering the king. After ten years of seclusion, he shows up again in the world to protect his beloved one. Although he is nicknamed Mr. Stone because he rarely expresses his feelings and indifferent to women as though they were stones, he is sweet and attentive to the one that he loves. To protect the one, he prepares himself to fight and risk his life.

“The prince of Euigwang will sit on the throne and the prince of Muheon will be the king’s servant and killed,” says a letter from Seoha. This letter turns the wheel of fate. Reading the letter, Woo is thrown into despair, and Seoha plunges another dagger
into his heart. The two are star-crossed lovers. Woo has been believed to be dead, known as the “dead prince punished by Heaven.” Seoha has been burdened as the child of dragon and has been living like a ghost. It took ten years for the two of them to meet again. Seoha could endure a life as a ghost, confined in a remote palace because of her unwanted ability, but she cannot sit still doing nothing for a future day that she views. She wants to change the two princes’ fate and prevent the day from coming by any
means. Can Seoha change the day, the day that she desperately tries to prevent from coming, keeping a secret from her one-andonly love who makes her feel a pang just by calling his name?