In the Gengzi year, the celestial phenomenon of "four stars in one" coincided, foreshadowing a change of dynasty. Cao Cao's (Chow Yun-fat) subordinates, especially his son Cao Pi (Qiu Xinzhi), hoped to take this opportunity to push Emperor Xian to the throne and Cao Cao to the throne; at the same time, the forces opposing Cao Cao also stepped up their actions. No one knew what kind of earth-shaking events would happen in the Han Dynasty when the four stars were in one. In Guanzhong, behind the prisoner camp of Ma Chao and Han Sui, the young man Mu Shun (Yu Muhong) and the young girl Ling Ju (Liu Yifei) were abducted by an iron cavalry and taken to a huge mausoleum for brutal training. They will be molded into iron-blooded dead soldiers to complete an ulterior and stunning mission. Five years later, Cao Cao burying Guan Yu and returning to Tongquetai, Ling Ju appeared beside Cao Cao in a red dress. The weak Emperor Xian of Han (played by Alec Su) and the ambitious Empress Fu (played by Annie Yi) are terrified of Cao Cao's return, and the ministers also have their own agendas. The four stars are about to unite, and a conspiracy to "kill Cao Cao" is being planned...