Xu Ran traveled through the late Han Dynasty, just as the chaos in Luoyang was approaching. After accidentally meeting Cao Cao, he decisively stopped Cao Cao from rescuing He Jin, and offered the amazing strategy of "serving the emperor's orders but not obeying the ministers". Cao Cao went from being shocked to decisively ordering troops, and the pattern of troubled times was rewritten. Relying on the prophets of later generations, Xu Ran made plans step by step, assisting Cao Cao to avoid crises, recruit talents, and sweep away the princes. In the troubled times of the late Han Dynasty, Xu Ran found a completely different path to hegemony, and eventually became Cao Wei's number one mastermind.