Falsely accused of altering ledgers and sentenced to exile, Shen Zhiwei and twenty-six companions are trapped in a dilapidated post station amidst a blizzard. Lacking food and water, with the rooms full of the wounded, relying on a cracked abacus, starting from calculating a single bite of rice, she repairs the post station, takes in business, transports military grain, and fights for a path to survival for everyone. But just as the post station begins to improve, the old military grain case uncovers layer upon layer of dark secrets, with the Pei family pressing step by step, even setting fires to eliminate witnesses. Someone wants her dead without proof, but she is determined to clear the accounts and open the path, wash away the grievances, and forge their own commercial route together with her companions!