Modern deliveryman Lin Yuan travels through time to the troubled Dayong era, possessing the body of a starved refugee, and accidentally activates the "Share Meal System", which allows him to exchange a fixed daily quota for modern food. Starting from a ruined temple, he uses the salt, sugar, and fat advantages of modern food to replenish his physical strength and gradually subdues the refugees. He leads the crowd to occupy Baishi Valley and Qingfeng Stronghold, utilizing high-yielding fairy seeds such as potatoes, sweet potatoes, and corn exchanged through the system to achieve a yield of a thousand catties per mu and solve the famine. Lin Yuan governs the stronghold with military law, establishes systems such as "one husband, one wife" and "exchange labor for food", and wins the people's hearts.