A modern special forces commander's soul travels across time to the late years of the Great Jing dynasty, becoming Lin Ce, a vulnerable youth pressured by his clan to take a relative's place and head to the borderlands. Facing clan oppression and a life-or-death substitute trap, he no longer endures or yields. After protecting his family, he resolutely embarks on a military career. Constantly harassed and plotted against by petty individuals within the camp, he relies on his extraordinary daring and military strategy to resolve crises time and again, training troops to unite hearts and emerging victorious against the strong on the battlefield. Rising step by step from a low-ranking recruit, a hundred men guarding a dangerous pass to forcefully resist powerful enemies, he achieves legendary and remarkable feats. Just when he attains success and fame, planning to return home to protect his loved ones, a secret letter from the capital suddenly arrives, and the massive chessboard of court disputes unfolds before him.