At six years old, Hwayeon Ryu slipped into a coma for reasons unknown to her. After twelve grueling years of her father, Chung Ryu's persistent efforts, she finally awakens from her deep slumber. However, she realizes that not only does she have her own memories, but she has also gained the memories of someone else's life, Yeonu Lee. Although taken aback at first, Hwayeon gradually adapts to her new life over time. One day, she visits the palace in the hopes of having lunch with her father. Unfortunately, she takes a wrong turn and stumbles upon the infamous beast, Crown Prince Muyeong...
