Lin Yuan, a modern office worker, transmigrates to Qingzhou, a war-torn region during the peaceful reign of the Dayong dynasty. He awakens in a dilapidated temple, on the brink of starvation, and unexpectedly activates a daily meal-delivery system with a budget of 19.8 yuan, allowing him to order food every day. In a brutal world filled with refugees and even cannibalism, he struggles to survive on the food provided by the system, avoiding attacks from desperate refugees while dealing with harsh ancient laws and exploitation by corrupt officials. Using modern products such as takeaway soup bases and plastic food containers to outwit danger, he befriends Chen Erlang and fights to obtain official household registration and a place to call home.