After a lifetime of hard work, Li Defu is forced by his daughter-in-law to divide the family estate in his old age. His house and farmland are taken away, leaving the man, now over sixty, with no choice but to live in a cowshed alongside the old yellow ox that has been his companion for many years. The ox often leads him into the mountains, where Li Defu earns his first income by gathering and selling medicinal herbs. He takes the lead in founding a medicinal herb cooperative with fellow villagers. Jealous of his growing success, his daughter-in-law repeatedly causes trouble, but Li Defu calmly resolves each conflict. By combining medicinal herb cultivation with rural tourism, he rises above adversity and becomes a leader who helps the villagers prosper together.