After the imperial court moved southward in the fictitious dynasty "Dazhao", the households in the six towns in the north were reduced to low status, their food and wages were getting thinner year by year, and the world was about to be in chaos. A mixed-race boy who can write in Huaishuo town becomes sworn brother with He Lanzhen, a boy from a run-down military family. When the chaos broke out, he and his wife crossed south to Luojing, and entered the shogunate clerk's office of Marshal Chi Luochi based on his handwriting. From then on, he copied military reports and saw the undercurrents under the river. The night changes in Heyin, the assassination of the general... At the critical moment that could overthrow the world, he stood on the writing floor and operated like a bookkeeper. The sword is in the light and the words are in the dark.
