The unorthodox cult, the Demonic sect, led by the Heavenly Demon, rose from their hiding after years, plunging the world into a chaotic horror. Yeong-jeon, the son of the sect leader of the Thunderous Sky Sect, vowed to return the world to peace. However, before he could even reach the Heavenly Demon's neck, he died, not knowing what happened to his comrades after that. After 200 years, he was reincarnated into the body of a child. "The Thunderous Sky Sect, you don't know about it?" "What do you mean by it is in shambles?!" "I, Yeong-jeon, will return the Thunderous Sky Sect's former glory!" It was the start of a man's journey to recovering what he had lost.