Lu Chen originally wanted to keep a low profile, conceal his abilities, and remain the mastermind controlling the game from behind the scenes. But with his father the king on the verge of death and the northern frontier in crisis, he is forced to shoulder the banner of the Prince of Zhenshuo. Facing the schemes of feudal lords, ancient seals, and conspiracies threatening the entire realm, he breaks through every predicament with a single long blade and suppresses the land through his own strength. Yet just when everyone believes he is merely a young marshal, they discover that the true player behind the scenes entered the game long ago. What he must protect is not merely the dynasty, but the last order holding this world together.