Modern youth Tang Shun accidentally soul travels to the Great Qian Dynasty Northern Court border, becoming a border minor soldier who has just experienced a bloody battle. The predecessor was naturally born with divine power yet had foolish intelligence; after a fierce battle, Tang Shun takes over this body. Just after crossing he is promoted to squad leader, ordered to lead a small team to stay behind and cover the rear, blocking alien scouts. Knowing full well it is a dead end, he stabilizes the army's morale, cleverly uses strategy, seeks survival in the desperate situation of the beacon fire frontier, and step by step fights out his own path forward in the troubled times battlefield.