Chen Mou is a modern man who accidentally traveled to the Three Kingdoms and became Cao Cao's mastermind. However, due to his experience of dying unjustly in his previous life, he became wary of others after his rebirth. In Wei State, he faced an internal power struggle in the court. Some ministers were jealous and suspicious of him. At the same time, the other two forces also looked covetously at Wei State in an attempt to hinder Cao Cao's unification process. Time is running out, Cao Cao is getting older, and the great cause of unification cannot be delayed. Although Chen Mou has memories of his past life, he lacks prestige. The implementation of his strategies is often hindered, and the psychological trauma caused by betrayal in his past life affects his trust and judgment of the people around him. The enemy forces also spread rumors and slanders against him, causing him to be misunderstood by some people in Wei. However, Chen Mou relied on his extraordinary wisdom and past life memories to gradually resolve misunderstandings, eradicate the separatist forces within the court, and skillfully deal with the conspiracies of the other two countries. During Cao Cao's lifetime, he helped Cao Cao overcome numerous obstacles and finally unify the three kingdoms, making up for his past regrets and gaining prestige and trust.