The widower Xie Changgeng learned that he had cancer and was very worried about the future fate of his mentally retarded son Chen Chen. In despair, he wanted to end his life with his son. At the critical moment, Tie Shi, director of the street office, saved the lives of the father and son. Under the persuasion of Iron Stone, Xie Changgeng was admitted to the hospital for surgery, and Chen Chen was also sent to Qixing School. At school, chenchen's intelligence was improved, and Chang Gung's housing conditions were also improved, which aroused Chang Gung's yearning for a new life. Soon, Xie was admitted to the hospital because of the deterioration of his condition. In the morning, he gave his father the reward "Seven Stars" he got at school. Xie held the "Seven Stars" and closed his eyes calmly.