Good-for-nothing county magistrate Li Yun transmigrates into the Zhenguan era, facing a hellish start from the start: the county lies in ruin, the deputy magistrate has seized power, and an inspection is imminent. With no way out, he binds himself to the Taoyuan County Magistrate System. Using potatoes, waterwheels, and barefoot medicine, he kindles a spark of hope, takes in refugees, makes firearms, and takes on the local gentry. Amid deadly plots, a crude waterwheel gets the muddy water flowing again, while iron-blooded firearms startle Wei Zheng's carriage. With sweet potato sprouts in one hand and a secret order from Black Wind in the other, the good-for-nothing magistrate vows, amid Turkic cavalry and the undercurrents of Chang'an, to turn this living hell into the Tang Dynasty's very own Peach Blossom Spring!