As time flows by, the beautiful youth era once lived seems like an unreal dream. It was filled with restlessness, joy, sadness, and indignation; it represented a youthful innocence that was far removed from the cunning realities of society, painting the brightest and most dazzling colors with its silly and naive purity. Looking back at those days now, even though they seem illusory like a dream, they evoke a sense of nostalgia and countless emotions. By an accidental chance, Chen Xun (played by Peng Yuyan), who has already passed his thirties, recalls a name he once shouted thousands of times. In his distant student days, Chen Xun, along with the girl who made his heart flutter, Fang Hui (played by Ni Ni), and friends Qiao Ran (played by Wei Chen), Lin Jiamu (played by Zhang Ziyin), and Zhao Ye (played by Zheng Kai), walked through the dust-laden campus. Friendship and love grew wildly like weeds in an era full of taboos; once, those were everything they firmly believed in, yet they have now been crushed to pieces. Do you still remember the promises you made? This film is adapted from the novel of the same name by Jiu Ye Hui.