Zhao Heng, a graduate student in history, transmigrates into the body of a down-and-out imperial clansman living as a guest in the Duke of Dingguo's residence. He is trampled on from the start, but uses his modern knowledge to plan his way forward step by step. He helps the Ninth Prince, Xiao Chengji, train troops on the frontier and turn the tables at court, and later relies on Cui Ningshuang's intelligence network and Wei Wujiu's military authority to resolve crises. But after Xiao Chengji ascends the throne, his suspicions deepen by the day. Su Mobai, a surviving heir of the previous dynasty, takes advantage of the chaos to unleash a bloody massacre, while the position of A Man, a hostage from the northern borderlands, becomes key to the power struggle. Caught in a maelstrom of political schemes, Zhao Heng is forced to transform from an assisting minister into a player moving the pieces. With the realm as his board and its people as his pawns, he ultimately overturns the old order and personally lays the foundations for an unprecedented imperial path.
