The whole group is out of food, bandits are blocking the road. What can an impoverished widow who once starved to death possibly do to keep everyone alive? Shen Qinghe, a modern agricultural scientist, transmigrates to the final years of the Great Yan dynasty and becomes the most unremarkable widow in a refugee caravan. Natural disasters have struck year after year, warlords rule in fragments, and corpses litter the land. Fortunately, she has a portable pocket dimension: a spirit spring, three mu of spirit farmland, and a library of agricultural and engineering books. It is her only trump card in this desperate situation. From finding food, repairing canals, and reclaiming wasteland, to building a stronghold, storing grain, training soldiers, and establishing a government, she gathers refugees into a community and turns a barren valley into a city. Warlords seize grain, great clans block the roads, and northern cavalry presses south. Everyone thinks she won't survive the winter. But later, the remnants of the court kneel and beg her to accept their surrender, while a million refugees recognize only her as their leader. Who, then, should rule this realm?