Meng Jing and Chu Xin were classmates in the repeat class of their senior year of high school, and Lu Yuan was Meng Jing's boyfriend at the time. The hardships of long-distance relationships and the opposition of their parents broke up the relationship between the lovers. It was at this time that Gu Ningxi appeared in Meng Jing's life, a man who suffered from severe depression but was deeply loved by Meng Jing. After the college entrance examination, Meng Jing went to Hunan to attend university, but Gu Ningxi still stayed in that small town. The two began their long-distance relationship again. Liao Shan is a girl who has been secretly in love with Gu Ningxi for many years. She suffers from a blood disease, which makes Gu Ningxi particularly fond of her. Her existence also creates more barriers between Meng Jing and Gu Ningxi. Gu Ningxi's school had a 19-year-old intern teacher who had returned from studying in Singapore. He was young and energetic, and she unconsciously liked Gu Ningxi. Then, unable to endure the pain of long-distance relationship and a series of problems that followed, Meng Jing and Gu Ningxi finally broke up, and Gu Ningxi chose to fall in love with the 19-year-old intern teacher.