Lin Mo transmigrates to the late Southern Song dynasty as a down-and-out medical student. With the help of the “Tiangong System,” he rises step by step, wielding medicine as a blade and strategy as a sword. In a desperate situation, with the Jin army at the borders and powerful court officials conspiring with a supernatural organization, he uses modern thinking to reform the military, medical, and economic systems. He battles his old rival Han Mingyuan in a struggle over the fate of their country and family, ultimately leading the Southern Song to military revival and institutional reform.