Jingxin is a high school student. Because of her father's joke bet with a friend, she became the number one married woman in the school. Without knowing it, she found out about her engagement to the crown prince. After returning home, she asked her father to terminate the engagement, but it failed. Later, in order to save her mother's belongings, she reluctantly agreed to the royal engagement. In the end, Jingxin was killed when she went to Japan for treatment, and the royal family misled her by pretending that she was dead. A year later, Jingxin appeared in front of everyone, but she did not know them.