Yeon Yoo-young has been living with his father and sister in the castle of Yongsan in the countryside since his mother was unfairly accused of theft and beaten to death. Tortured and abuse by his family, the young man has become frail and thin, and deemed a mute due to his inability to speak properly. One day, he decides to jump off a coastal cliff and end his life, but instead encounters Crown Prince Jinbi Hyul and falls in love at first sight! Yeon Yoo-young regains his will to live, but his sister soon plots to win the prince's affection for herself. Jinbi Hyul, however, is known for his cruel disposition…