Dajing suffers from continuous droughts for years, and Liaodong is plagued by constant famine and war. Apocalypse logistics expert Su He accidentally time-travels to become a convict slave, about to be assigned to a military household to start a family. While other female slaves all wanted to pick a good destination, Su He only valued a sense of security, selecting the brave centurion Xiao Zheng. Xiao Zheng originally had no intention of marrying, only wanting rations. Su He stated that she could do farm work and stand on her own, needing no care from him. After marriage, the two guarded the border side by side, with Xiao Zheng going to the front lines to fend off enemies, and Su He reclaiming wasteland and hoarding grain. The couple joined forces to deal with neighborhood disputes, grain crises, and invading enemies. Xiao Zheng rose step by step through military merits, and everyone in the world said that the great general's capable wife possessed astonishing grain-growing skills.