Lu Jianguo, a rural teacher, has devoted his entire life to the mountains, quietly supporting education and public welfare. When he visits his children and grandchildren in the city, he is met with misunderstanding. Nevertheless, he remains upright and patient, protecting the children's dignity and insisting that everything be done by the rules. He works to ensure that charitable funding is transparent and publicly accountable. Gradually, his family comes to understand the importance of family affection and responsibility, while the children learn to become independent and self-reliant. In the end, the family finds its way back to mutual understanding and responsibility, extending their love to rural education and more children in need, and passing on the values of educational equality, family tradition, and love for their country.