After a modern young man sacrificed his life to save others, he traveled through time and became Li Jingyuan, the sick prince of Daheng, who was trapped in a desperate situation of killing and poisoning. After activating the Great Tyrant System, he obtained the Luo Sheng Organization and the Vajra Indestructible Magic Power, summoned Dian Wei, Deng Tai'a and other heavenly generals to form the Tiger Guard and the Snow Dragon Cavalry. He cleans out the secrets of the East Palace, massacres the Taiqiu Sect, suppresses the black market, suppresses the Ganzhou mutiny, eradicates hostile forces such as the prince and the eldest princess along the way, and intimidates the court and the world with iron-blooded means. Finally, he is promoted to the Celestial Realm, perfects the swordsmanship of the country, is recognized by his father, and becomes the most powerful prince, embarking on the road to an eternal tyrant.
