This drama is adapted from the Douban Reading serial novel "There is a Red House Under the Tree", written by Xiao Ge. A small town girl named Chen Huaner moved to a big city with her parents. She and her two new friends Jing Qichi and Song Cong went through all the important nodes of life together, from high school to college and then to graduation. During this period, there were plain and trivial days such as reading, outings, sports games, and book drifting, as well as the sourness of secret love, the unwillingness of aborted ideals, the unpreparedness of family changes, and the confusion and pain of facing the death of relatives for the first time... These three teenagers supported each other through the pain of growing up, and grew from ignorant teenagers to adults who integrated into this society. In the end, they grew into a self that was completely different from what they imagined in high school, but also good enough. Of course, the most important thing is that they always stayed by each other's side and never got separated.