Shen Yan traveled through time and became a death row prisoner in Dayong, and was taken to a death camp in the northern border at the beginning. The imperial court wanted him dead, the border troops wanted him to take the blame, and the barbarian cavalry wanted his head to be sacrificed to the flag. Everyone bet that he would not survive three days. But Shen Yan relied on a broken sword to kill the scouts first, then captured the beacon tower, and led thirty death row prisoners to defend the broken city. The emperor asked him to guard the border. No one asked him to guard the border as his own world.
