Dandelion is the first and only middle school for children of migrant workers. Miss Yuan, the music teacher at Dandelion Middle School, runs a chorus for years. With the construction of Beijing Daxing International Airport, Dandelion Middle School are going to be moved to another place as it is just on the planned Airport Freeway in not far future. Children of the chorus live their different lives, some should take care of their disabled parents, some would quit school and go back to their hometown in mountains. In this familiar but sometimes difficult city, they have their own hard times. However, they have music and happiness.