Jiang Wan, a postdoctoral researcher in agricultural science, travels through time and is abandoned on a snowy frontier by her stepsister, Jiang Rou, and her uncle by marriage, left on the brink of death. She awakens a system dedicated to saving the people and receives an iron pot and matches as her starter gift. Using her agricultural expertise, she wins over displaced refugees, builds earthen kilns, makes compost, constructs insulated greenhouses, and plants cold-resistant hybrid rice. While ice fishing on a frozen lake, she unexpectedly hooks Chen Xuan, the Prince Who Guards the North, who is gravely wounded and framed by the imperial court. Working together, they forge military-engineering shovels and composite alloy bows, discover underground fire oil, and develop internal-combustion war vehicles. They foil Jiang Rou's schemes and defeat the Northern Di army, establish a self-sufficient settlement, and reclaim a frontier garrison town. Later, as she unlocks industrial blueprints, Jiang Wan discovers that another time traveler has appeared. Thus begins a story of farming, developing industry, and building a future amid the chaos of a troubled age on the frontier.