Chen Yan, a modern man, transmigrates into the body of a groom about to marry into a general's household. On his wedding day, he faces the shocking upheaval of the general's family being confiscated and destroyed. Armed with modern knowledge of military theory, political strategy, and technological inventions, as well as an awakened "Omniscient Map System," he rises from a man forced into marriage as a live-in son-in-law to become the overlord who unifies the north, ultimately claiming dominion over the realm.