Meng Chen time-traveled to become the sixth prince of the Great Xia Dynasty, obtaining the inheritance of the Immortal Cauldron at the start. Eight years ago, he was schemed against by his five elder brothers, his maternal clan was murdered, and he was sent to an enemy country as a hostage. Eight years later, he was recalled by an imperial decree to marry Li Qingyue, the granddaughter of the Prince of Zhenguo. People across the world thought he was still a discarded prince, not knowing that he already controlled the forces of the world, known as the Immortal Son of Heaven. Li Qingyue was hailed as the First Female God of War of Great Xia; she did not know that Meng Chen's true identity was immensely powerful. On the wedding day, various factions gathered wanting to see the Prince's Mansion make a fool of itself. Li Qingyue was suspicious of her husband's identity. Amidst the imperial dynasty's disputes, various factions arrived one after another, and everyone suddenly realized how powerful Meng Chen was. When people thought he was going to unify the imperial throne, he instead slashed open the firmament with a single sword.