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.
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.
This documentary is about a school in the mountainous area of Hunan and focuses on left-behind children in three families. Due to contradiction between backward rural appearance and urban development, the fate of the three generations interwoven together.
Yuguo was from the forest in Mongolia and received free education in city with social support. He returns home in the holiday after many years and doesn't know what to do.