Due to circumstances, Hao Nan had to return to his old teaching post. He meets new student Ren Zhen and a group of teens who, through their "unruly" teacher, gradually open their hearts to usher in their brilliant lives. The 28-year-old Hao Nan left teaching for five years and became the owner of a pool hall, but the good times did not last. After having to close the shop, he resumes work as a teacher. The 18-year-old Ren Zhen fails the gaokao due to her unreliable father. She meets an equally frustrated Hao Nan on the rooftop, and he uses his own experience to encourage her.