The film tells the story of Lei Chunyang, who came from a big city to teach in a rural area in the 1990s. He gave his class a new look and was willing to offend the principal for the benefit of the children. He was forced to leave the school due to the exclusion of sponsors and the principal. After an investigation by the Education Bureau, the black-hearted principal was expelled, and Lei Chunyang returned to school and reunited with the children.