Set against the backdrop of Wuling City, the work tells the story of Chu Qingxiao, a young man, who unites with Song Guicheng—the commander of Xizhou's Sword Armor Forces—and others to resist foreign invaders amid the crises of the Zhuyin alien clan besieging the city and the spread of the Black Blood Disease plague. Through the narrative form of The Lone City Notes, the progress of the battle is presented. The story involves settings such as the history of the Xuntian Division organization and the Taoists of Xuandu Temple, and centers on the main plot of Chu Qingxiao carrying out the final mission and reconstructing the rules.