Yeon Hojeong, the grandmaster of the Black Dao who unified it for the first time, lived under the reign title of Black Darkness. He joined forces with the righteous sects to overcome the Three Sects' Rebellion, but he met an unfortunate end due to the schemes of the Murim Alliance leader. Waking up, he finds himself in the home of the Yeon family, the most prestigious family in Murim that was once annihilated—his home, which he had never forgotten. "This time, I won't make a mistake. Absolutely." To prevent the annihilation of his family and the future Three Sects' Rebellion, he races against time! The story of Yeon Hojeong's struggles to unify the martial world.