In the second year of Jian'an, Cao Ang awakens in Wancheng from the searing pain of arrows piercing his body, only to discover that he has been reborn with the "Cao Wei Sage Ruler Support System" on the eve of Zhang Xiu's rebellion. In his previous life, he and Dian Wei died protecting Cao Cao, and Cao Wei later descended into a destructive struggle over the succession. This time, he acts decisively and beats Cao Cao to recruiting Dian Wei. Drawing on his memories of his previous life and the System's warnings, he exposes Zhang Xiu's ambush plot, saves his father and the fierce general, and wins Dian Wei's unwavering loyalty.
From then on, Cao Ang begins a thrilling comeback. He lays an ambush at Rangshan and captures the Lü Kuang brothers, then recruits surrendered generals to expand his power. At Bowang Slope, he uses fire to cut off Liu Bei's supplies and block his path to joining Yuan Shao. With the "Trapping Camp Training Manual" unlocked by the System, he builds an elite private army and can even assess generals' loyalty, allowing him to recruit talent with precision.
From turning around the tragedy at Wancheng to helping Cao Cao pacify the warlords, resist Yuan Shao, and fight Sun Quan and Liu Bei, Cao Ang uses foresight and the System's support to shore up Cao Wei's weaknesses step by step. He becomes not only Cao Cao's most trusted heir, but also the architect of a bold new vision to "unify the Three Kingdoms and rule the world," steering Cao Wei away from the regrets of his previous life and toward a more prosperous future.