Zhao Rurui and Zhao Ruxin are sisters. Rurui has been a top student since she was young and will become a doctor. In contrast, Ruxin, a high school student, is mediocre and is not valued by her parents and teachers. She is jealous of her sister Rurui. On the eve of Ruxin's college entrance examination, Rurui died in a car accident, which was a huge blow to the family. Ruxin found another mobile phone among Rurui's belongings and was puzzled about her sister's life. She went alone to the big city where her sister lived before her death...