In the summer of 1976, seven-year-old Lin Banxia moved into Qingshi Lane, a small town in northern Jiangsu. The neighbor boy Shen Zhiyuan used watermelons soaked in well water, sweet dates shot with a slingshot and sweaty food stamps to build a gentle fortress for her in the era of material scarcity. From the deskmates sharing a kerosene lamp while doing their homework, to waving through the green leather car window on the college entrance examination platform; from sharing a pair of headphones to listen to "Female Alice" in the university library, to the figure who is never absent under the streetlight in the early morning of the textile factory. In the past twenty years, they have experienced life and death dependence in the earthquake shed, the divergence of destiny after the resumption of the college entrance examination, and fierce disputes during the southward tide. When the wedding was held next to the old well in 1996, the Double Happiness enamel basin reflected two faces that were no longer young, and the jujube trees in Qingshi Lane still bore fruit every year. This is a story about "staying" - in an era when everyone is running away, some people choose to keep a well, an alley, and a person. Where the fireworks are dense, deep love takes root.