Set in 1950s, along the Minjiang River, Fujian Province. Li Yinhua and Yang Xiaolong are childhood growing up friends and have similar interests and ambitions. They work for Baihua Isle mutual aid group now. Xiaolong's father is an individual peasant household and has a different standpoint against his son. There are several self-serving members in Yinhua's team and they are contentious about the fairness of work-points. When citrus trees suffer plague of insects, Xiaolong's father fails in rescuing the trees. At this critical moment, Yinhua get insecticide and sprayers from the district government and help peasants riding out the storm.