In the early 1970s, in response to Chairman Mao’s call, educated young people went to the mountains and countryside. The teacher brought the educational revolution practice group to Xiping Village to collect ideas and compile teaching materials. High school student Jingqiu was arranged to stay at the old village chief's home. When the village chief's wife introduced the situation, she mentioned a young man named Lao San. He is a member of the geological exploration team. He works on weekdays and rarely goes home. Jingqiu was very curious about the third child, and finally the two met, using the hawthorn tree as the topic, revealing their hearts and liking each other...