The 20-year-old Che Shangyin (Jiang Huizhen) is kind and beautiful, has a talent in origami and lives a happy life with his mother (Pei Zongyu). Although Shang Yin looks like a 20-year-old girl, she only has an IQ of 7 years old. Because of her mother's love, Shang Yin does not feel that she lacks anything in her life. She likes to amuse herself by using the protagonists in fairy tales. But the appearance of Zhong Fan (Zheng Jinghao) makes Shang Yin have a wonderful feeling in her heart, because she regards the outstanding Zhong Fan as Prince Charming. After several dates, Zhong Fan learned about Shang Yin's illness and gradually moved away. Shang Yin, who was badly hit, refused to tell the truth to his mother, who had always trusted her most.