A group of Lisu people without a registered ID (Hukou) live their primitive life in the mountains by the Nujiang River in Yunnan. In addition to misfortune and hardships, they also have simple happiness.
Rubel wants to join school but reality forces him to smuggle across the River Ganges between India and Bangladesh. The same river eroded his home. Now he lives on Char, an island within this river which starts eroding now.
Jiayi is a left-behind child who has to endure the bitter taste of separation from parents. However, she still has to forget sadness and grows up in pain and joy with her brother.