In Beijing in the early 1990s, the young boy Qiu Shui's body was growing vigorously. With the help of the wild education of the gangster Kong Jianguo, a burning hormone quietly awakened from Qiu Shui. At the same time, the fresh and beautiful girl Zhu Chang broke into Qiu Shui's life, stirring up Qiu Shui's playful life with Liu Jingwei and Zhang Guodong who grew up together in the tube building. The three began to fall in love. Youthful restlessness, the infatuation with a girl gradually became Qiu Shui's main life, but the introverted and delicate Qiu Shui never dared to confess to Zhu Chang. After the college entrance examination, Qiu Shui proposed to Zhu Chang, who was about to go to study abroad, but everything was over, including youth, including the throbbing memory of the 18-year-old heartbeat.