One watermelon rind, four youthful lives. The story revolves around Li Kuotian and three friends from their first meeting in high school, preparing for the college entrance examination together, being admitted to the same university, experiencing the fission and reshaping of friendship, the budding love, and the final choice of their career path. Laughing all the way and crying all the way, there are occasional "stepping on watermelon rind" funny moments in the process of growing up, and there are also sentiments of reunions and separations. In the midst of intense study and cruel reality, they used joking and optimism to resolve the crisis, pulling each other forward, and finally found their own direction in the summer of farewell.
