The film consists of 9 warm and inspiring short stories, telling the stories of 9 disadvantaged children chasing their dreams. The 9 stories focus on: poor children, children with dyslexia, mentally retarded children, trafficked children, blind children, obese children, deaf-mute children, left-behind children of ethnic minorities, and children of prisoners. The nine short films included in "One Day": "Solo Orchestra" Deaf-mute children live in a silent world, but can sing the purest songs. "Crazy Bread" Mentally retarded children will never grow up in their lives, but they also have their own sadness and happiness. "The Way Home" Trafficked children are now living on the streets, but they were once the treasures of their parents. "Invisible Paintings" Visually impaired children live in a dark and lightless world, but they may see more than we do. "Diary of a Little Fool" Children with dyslexia cannot read texts or do homework, but they may be little geniuses. "The Sun Will Fly" Children of prisoners whose parents are being punished, but they still deserve to be loved. "Little Cinema" Poor children have few light and shadow stories in their lives, but they still have the right to let their dreams fly. "Qiuzha" Obese children Their lives may be heavy, but if they are given more attention, they will also shine. "Gift" Left-behind children Their language is about to disappear, but their culture is still a different kind of fireworks.