Lu Xian opens his eyes to find himself transported into the world of immortal cultivation as a corpse puppet, being controlled by the wicked cultivator Xuan Gu and sent to his death. Just as he is about to be struck down, he awakens the Heavenly Fate Wicked Cultivator System, becoming an extraordinary cultivator who is neither human nor corpse. While fleeing, he unexpectedly obtains a divine weapon: the Radiation Demon Sword. With the system's guidance, the tables turn. Not only does he defeat the Qingyun Sect cultivators hunting him, but he also subdues the wicked cultivator Xuan Gu! To obtain higher-level cultivation techniques, he decides to help Kui Wuji, the Demon Sword's original owner, return the Holy Son Token to the Demon Sect and participate in the Holy Son selection trial. Ultimately, he overwhelms all his opponents and becomes the Demon Sect's Holy Son. He also defeats the Grand Elder who has constantly targeted him and successfully saves the sect.