In the final years of the Great Chu dynasty, war raged across the northern frontier. Emperor Xiao Chengyu feared Xiao Zhan, the Northern Defender General who commanded the 300,000-strong Black Armor Army. Under the pretext of a “marriage alliance,” he sent Xiao Zhan to the bitterly cold Yanmen Pass, while secretly ordering his corrupt ministers, Chancellor Wang Zhong and Grand Commandant Li Tong, to withhold provisions and military funds in an attempt to weaken the general’s authority. Lin Wan, a modern emergency room doctor, transmigrates during a thunderstorm, her soul entering Su Mingyue, the general’s wife, who died in childbirth at the general’s residence. In her former life, Su Mingyue had been a pawn, a substitute bride for Xiao Zhan’s childhood sweetheart, Su Wanrou. Lin Wan unexpectedly activates her golden finger, a “space-time hub” that can connect to modern supermarkets, the equipment stores of top-tier hospitals, and military-industrial warehouses. It can be used for up to six hours a day and consumes mental energy. She also has an independent 50-cubic-meter space where items can be frozen and preserved.