Li Xiao was once the sharpest sword in the imperial capital. An imperial edict demoted him to the Far North Frontier Army. He tore up the edict in public, knelt down and laughed, staining the yellow sand with his blood. Xie Jin, the former general who had been imprisoned by him personally in the sky prison, actually appeared with his remaining troops in the wind and snow, with no hatred in his eyes, only one sentence: "You and I have never been enemies." On a cold night at the border, the former enemies were forced to share the same bed to keep warm. There was a huge conspiracy behind the imperial decree, and the one who really wanted to kill them was the man sitting on the dragon throne who had long since disowned his old friend.