During their graduate studies, Xia Xi and Chen Shu find kindred spirits in each other. As time passes, they fall in love, yet in the end, both silently keep their feelings to themselves. To the long river of time, the love they buried in their hearts is no more than a fleeting burst of fireworks. No gathering lasts forever. All their memories, affection, joys, and sorrows will eventually disperse like rain and mist, vanishing with the passage of time without a trace.
