Zhou Dashan, the owner of a small grocery store, accidentally discovers that the warehouse wooden door leads to an ancient famine year. To save the starving Xiaoman and Lin Yueniang, he continuously transports food, water pumps, and seeds, and leads Qingshi Village in digging ditches, reclaiming wasteland, building granaries, and doing business. After the village gradually shakes off the famine, Zhou Dashan understands that true help is not long-term support, but teaching them to save themselves. Eventually the wooden door closes, he returns to modern times, and Qingshi Village is already able to survive independently, while Xiaoman has also grown into a girl who can stand on her own.