As the autumn harvest approaches, the Xu Family Village faces a crisis of labor shortage and grain difficult to harvest. The clever and witty Xu Mancang has a flash of inspiration and writes a letter full of affection. The top scholar Xie Zhiheng rushes over full of joy, thinking that what awaits him is longing and gentleness, but he never expected that what awaited him was a brand-new sickle and twelve mu of rice fields on the east side! From then on, the noble top scholar is forced to go down to the fields, the young marquis of the capital carries grain bags, the talents of the Imperial College and Imperial Academy join the autumn harvest battle one after another, and even officials of the Ministry of Revenue are invited to study agricultural affairs. Facing the calculations of grain merchants and the difficulties of the autumn harvest, Xu Mancang relies on wisdom and courage to step by step turn a small farm village into the hope of changing the world's grain industry.