Emperor Wen of Wei, Cao Pi (Li Chen), who had great ambitions in vain, suddenly passed away at the age of 40. His son Cao Rui (Liu Huan) ascended the throne, but he resented his father and Queen Mother Guo (Tang Yixin) because of his mother Zhen Mi. In the court, Cao Zhen and Cao Xiu, who were important ministers entrusted with the care of the orphans, tried their best to exclude Sima Yi (Wu Xiubo), who was ordered to return to the capital, in order to strengthen the power of the clan. Outside the Wei Kingdom, Sun Quan pretended to obey but secretly disobeyed, eyeing Jiangdong. Under the auspices of Prime Minister Zhuge Liang (Wang Luoyong), Shu Han methodically promoted the Northern Expedition. In this process, Sima Yi, who was used to forbearance, accumulated strength and gradually took the initiative in the struggle in the temple. His two sons Sima Shi (Xiao Shunyao) and Sima Zhao (Tan Jianci) became his right-hand men whom he fully trusted. He consumed Wei Mingdi and Zhuge Liang, and longed to change from being the knife in someone else's hand to being the one holding the knife, but he seemed to have never been able to escape the pursuit of fate. In his seventies, with gray hair, did Sima Yi realize that he had long since strayed from his original intention?