She is originally a young woman joining the ranks of the knights in order to prove herself to her mother and her lover's kingdom. Her life was almost perfect, but mostly it was a lie. But everything changes the day the hunters from the neighboring kingdom, pulling a mission bearing a terrible blow on her life. When they killed her beloved ones, the truth from the past comes out and she was a hidden royal who were meant to be kidnapped. And the only left thing to do is to confirm her true blood. When she came into the Kingdom of Ilrien, she think she have saved herself from any kind of love. But her promise to herself has cursed her: in the chaos of acquanting herself as a Princess, a guard named Lee Heeseung appeared in the picture. It will take all of her strength to resist him, and all of her wit to look at him as her only guard, her sworn protector. And though her toughest enemy might be the pressure of the royal court, it is truly her heart which is the strongest bond for her to find peace once again in his side.