Wu Biao transmigrates to the Great Yan Kingdom just as the northern bandits of the Great Mo Kingdom invade, routing the Yan army for hundreds of miles. Wu Biao leads his troops to escape the Mo pursuers, forms the Great Xia Volunteer Army to Resist the Mo, and establishes a base in northern Shanxi. Drawing on knowledge from his previous life, he invents firearms that leave the Mo bandits trembling with fear. Heroes from across the land rally to his cause. He also sends people to the Western Regions to bring back crops such as cotton, corn, and sweet potatoes, giving the base the ability to feed a million troops. He forges friendly, mutually supportive ties with the Mongols, and together they defeat the Mo bandits.
Unwilling to let imperial authority slip from its grasp, the Yan court sends troops to attack the volunteers. Wu Biao learns that his parents, renowned generals who fought the Mo, were killed by the court. He leads heroes from across the land in overthrowing the Yan Dynasty, avenges his parents, and establishes a new regime.
After unifying the country, he gives up command of the army, establishes a national assembly, and introduces elections, ushering in lasting peace.
He himself strives to put his knowledge from his previous life to use, accelerating technological progress so society can enter the age of mechanical engines as soon as possible, all for the good of the people.
