A modern agent time-travels to Dazhen, replacing the murdered reigning crown prince, Chen Feng. Amidst the treacherous and unpredictable imperial court, he relies on extraordinary courage and strategy to resolve plots by the princes and political struggles in the imperial court. Unbound by background, he gathers humble warriors and criminals, discovers talent, and trains a new army. Through hunting games and political gaming, bloody battles in the Western Regions, breaking through wave after wave of life-and-death crises, rescuing the Guiyi Army trapped at the frontier, and thwarting foreign enemies' plots. Prioritizing the country and its people, guarding the territory and subjects, shouldering the responsibility of the crown prince in troubled times, and writing his own legendary tale of serving the country.