故事发生在长沙的一个奇妙的夜晚。夜猫子景为为(尹昉 饰)在书店邂逅了明早将要离开故乡的何西西(张婧仪 饰),俩人相约搭伙夜游。何西西聊起同父异母的哥哥,脱口秀演员何岸(张艺兴 饰),就在今晚的演出上,何岸的父亲(罗钢 饰)出现在观众席中,俩人不欢而散。另一边,陈清智(白宇帆 饰)、梁宝琦(周思羽 饰)、老谢(吴军 饰)守护着摩天轮,他们边欣赏夜景,边感叹打工不易。夜更深了,这一晚也是网红大排档老板娘丽姐(苏岩 饰)最后一次掌勺做粉,她决定让自己的徒弟旭哥(吴昊宸 饰)接手继续经营大排档。夜晚即将过去,一群人一起坐在大排档里嗦粉,邂逅、热爱、留下、离开、和解、团圆,都发生在这座城市里,每个人都找到了深爱这里的理由。
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