The isolated city of Yanmenguan is in danger, and the female general Mucha is bleeding with her silver spear and insisting on defending. The civil servant Cheng Muyun had no intention of escorting grain, and traveled thousands of miles to danger. His lonely courage brought the city vitality. On the day when the wild goose returned south, he burned his official robe and gave up half his life's future, and was willing to accompany her to guard the border. After the blood and fire, the most touching thing is not to be granted the title of prince or prime minister, but to watch the fireworks of the world side by side from now on.