The story revolves around Duan Ling, the son of a sect leader, who was abducted by the demonic cult as a child. There, he met the Lu family's twin brothers, Lu Xiuyan and Lu Xiuwen. Lu Xiuyan was gentle and kind, while Lu Xiuwen was sharp-tongued and cunning. With Lu Xiuyan's help, Duan Ling managed to escape the cult. Ten years later, Duan Ling had grown into a renowned hero. To fulfill the promise he made to Lu Xiuyan—“I will definitely save you”—he fought his way back into the demonic cult. However, upon reuniting, Lu Xiuyan was nowhere to be found, and he only managed to rescue Lu Xiuyan's twin brother, Lu Xiuwen…