In ancient times, Emperor Zhaoming pleaded for the people and sacrificed himself to fight against the gods. After Zhaoming fell, his lover Chaos Pearl risked his life to save a wisp of his soul and set up a reincarnation for eternity. After eternity, Zhaoming reincarnated as Xie Xuechen, the leader of the Immortal Alliance, and Chaos Pearl also became Mu Xuanling, the saint of the Dark Realm. The two finally reunited in the human world, but they had forgotten their past and became "good and evil cannot coexist" opponents. Mu Xuanling saved the seriously injured Xie Xuechen in the Dark Realm and threatened to go with him with the grace of saving her life. Along the way, the two went from having their own schemes to fighting side by side, and secretly fell in love while removing their guards. However, in the conspiracy to compete for the artifact "Chaos Pearl", the two fell into a life-and-death test. Mu Xuanling sacrificed herself to save the world, and Xie Xuechen changed his fate against the will of heaven and went back to the past to save Mu Xuanling. After the catastrophe of eternity ended, Xie Xuechen finally returned to Zhaoming, but Zhaoming's body had become a fallen god. Mu Xuanling awakens the fallen angel with love, eliminates the catastrophe, and brings peace to the world.