SEO-ON (CHO-HEE), the second princess to the throne, gets sucking into a lake by a mysterious magical spell. A few days later she finds herself in a strange place, in a different person’s body next to the fourth prince. She pretends that she has lost her memory, and becomes the prince’s servant. However, her beauty arouses jealousy and plots against her constantly. One day, she is bitten by a snake, but the snake dies instead of her! What gave her these powers? And where would it lead her?