Living as an orphan while begging, Cheon Yoo-ok encounters a friend named Gun-ak. Yu-ok saves Gun-ak's younger brother, Cheong-ah, and in return, Gun-ak saves Yu-ok's life. They become close friends, willing to sacrifice their lives for each other. Together, they join Heavenly Sovereign Sect, where they are groomed as disciples of the Overlord and Cheon Gi-won, the military leader of Heavenly Sovereign Sect. Passing through the Hell's Gate, Yu-ok becomes the Dark Blood King. Nearly losing his life as the enemy of the White Faction, but he survives by exchanging his life for that of his foster father, Fung-baek. Heavenly Sovereign Sect is not content with staying in one place by Heavenly Emperor, who seeks to rule the world. As a counterforce to the ambition of the Heavenly Emperor, various factions emerge. Using the scheme of the White Lotus Army, they start spreading bloodshed towards ruling the world…
