Yu Hang, Mao Xiaopeng and Qin Yu are both left-behind children in Wutong Town and underachievers in Wutong Middle School. They are often punished by their head teacher and other teachers for violating school disciplines. Later, Xia Xue, a graduate student teaching teacher came to Wutong Middle School. With the encouragement and help of Teacher Xia, several troubled teenagers decided to change their minds and start a new life.
