Once he traveled through time, he became a clan member of the Song Dynasty who was deposed as a commoner and exiled to the frontier, but he awakened the "historical deduction simulator". He started as a soldier in the border army, could simulate the future before making every decision, and saw the pros and cons of life and death. Finally, at the minimum cost, he crushed the traitors step by step and regained the mountains and rivers. In the end, he grew from a hostage that everyone could bully into a regent who held the power of the world, rewriting the fate of a weak dynasty.
