Xiang Yang, a sixteen-year-old female high school student, dreams of traveling to Tibet one day while concentrating on her studies. Her parents divorced, and she lived with her mother and younger brother, sometimes having to work to earn money. There are always more banknotes in the piggy bank, but I live a life where I can't see the future. Whenever the sun sets, Xiangyang will come to the roof of the abandoned green leather carriage to read, imagine life in Tibet, and write longing diaries or poems. Coincidentally, Xiangyang's attention was attracted by the sight of Du Cheng, a 17-year-old transfer student, painting in the sunshine of the rice fields in the reeds while eating bonbons.
Soon after, they met each other in dreams frequently. If the two people have a tacit understanding, they escape from the troubles of the world every sunset and meet in the warmest and quiet corner of this coastal town. In the green season, their hearts gradually moved closer to each other.