Jiang Jianwei is rejected by her family through a broken engagement and exiled to the bitterly cold Ice Pass. Gifted with the extraordinary ability to see through frozen soil and uncover underground ruins, she chooses to settle in the dilapidated house of Pei Changye, a disgraced general who was falsely accused. She discovers geothermal heat to build heated beds and finds ancient seeds of cold-resistant wheat. Leading military households, she builds greenhouses and opens flowing irrigation channels, growing crops in the frozen wasteland. She fights corrupt grain officials and those who covet her achievements, gathers evidence to clear Pei Changye's name, and exposes the embezzlement of military provisions. After the injustice is finally overturned, she refuses to return to the capital, choosing instead to remain at the Ice Pass, build the Green Granary, and lead the people in reclaiming and cultivating the wilderness.