He Yuhong was a game designer obsessed with the Three Kingdoms. After pulling an all-nighter at work, he unexpectedly transmigrates to the end of the Eastern Han dynasty. He arrives in the middle of a battle between the Yellow Turban Army and government troops. Using the military tactics he learned from games, He Yuhong leads a small squad around to the Yellow Turbans' rear and sets fire to sulfur he had prepared in advance, sowing chaos. The government troops seize the opportunity to counterattack and win a great victory. From then on, He Yuhong's reputation soars.
When Cao Cao hears about this, he lays out a grand feast. After several rounds of drinks, just as Cao Cao is about to make his move, He Yuhong sneers, “Lord Mengde, your Qingzhou troops may be strong, but Yuan Shao has already set his sights on your supply routes.” Cao Cao's expression changes. He Yuhong kicks over the banquet table. “In this chaotic age, I will be the one to rule!”
When Liu Bei hears the news, he rushes over with Guan Yu and Zhang Fei. He Yuhong has already set traps along the way. As the Shu army arrives, boulders come tumbling down. Zhang Fei's horse bolts, throwing him to the ground. Guan Yu is about to charge forward when He Yuhong deliberately shoots an arrow wide as a warning. “Lord Xuande, your false benevolence won't work on me!” He knocks Liu Bei down with a single punch.
After these successive victories, strategists like Guo Jia and Xun You, and fierce generals like Zhang Liao and Zhang He, all come over to join him. He Yuhong turns his attention to Jiangdong. He spreads rumors to sow discord between Sun Quan and Zhou Yu, while also building a new kind of warship. At the Battle of Poyang Lake, he commands the navy to crush all opposition and wipes out Eastern Wu in one fell swoop. Diao Chan, Da Qiao, and Xiao Qiao are all won over by He Yuhong's charm. With the strategies of a transmigrator, He Yuhong dominates this chaotic age and writes a legend of his own.