Lin Dongqing, young and newly graduated from a normal university, gets his first job at Mingshi Primary School as the head teacher of grade 5's Class 4. The principal takes him to his new post, he stresses that the number of problem students in this class is higher than usual, and urges him to be extra vigilant with them... But the idealistic (and untested) Lin Dongqing, itching for a chance to prove himself, isn't frightened he's all the more eager. It's just that as he clashes with the students time and again, he can't help but wonder if he's doing something wrong. He enlists the help of school counselor Mrs. Ding, and with her help learns to appreciate and respect the unique challenges of each of his students. Slowly and carefully, he wins the trust of his students as he helps them overcome their problems, and as they grow, so does he.