Left-behind elderly woman Li Xiuqin, granddaughter Zhang Yaoyao, and little dog Laifu depend on each other for survival in the countryside. On the day of the Beginning of Winter, Li Xiuqin joyfully waits for her son Zhang Fuze and daughter-in-law Lin Manyu to return for a reunion. Unexpectedly, as soon as the two arrive home, they inform Li Xiuqin that they are taking Zhang Yaoyao back to live in the city. Zhang Yaoyao is unwilling, angrily runs out, and is unexpectedly abducted by human traffickers. Li Xiuqin, Zhang Fuze, and Lin Manyu search in vain with no results, but the clever and resourceful Laifu discovers Yaoyao's information and constantly hints to the few of them, ultimately saving Yaoyao.