A modern youth named Lincoln travels to the Great Zhou Dynasty, becomes the magistrate of Peach County in the northern border. He spends seven years turning the poor county suffering from famine and war into a prosperous land. Empress Mia (Mia Wood) goes on an incognito inspection, witnesses cross-era inventions including Soap, Golden Rice, and Sniper Rifle, and gradually develops affection for Lincoln. Prince Wu Kenton Wu colludes with the Northern Tribes to stage a rebellion. Lincoln leads troops with new-style weapons to defeat the enemy, rescues the kidnapped Empress Mia, is finally enfeoffed as the Lord of Northern Border, and governs the country hand in hand with Empress Mia, ushering in a peaceful prosperous era.
