Chaos first opened, three thousand demon gods fell, and the ancient world was born. The Beginning Demon God secretly planned to use the Demon God of Kaitian as a sacrifice to create a new world. The remnant soul of the Kaitian Demon God was reincarnated as Yuyang Taoist, and the Emotional Demon Yunxiao was also reincarnated. In three lives and three lives, the two met and fell in love with each other, but they were always controlled by the Beginningless Demon God. Taoist Yuyang gradually awakened from an ignorant monk to the memory of his past life. With Yunxiao's emotional support, he gradually broke through the limitations of heaven. Facing the ultimate plan of the Beginning Demon God, the two must choose between love and detachment. Should they join hands to fight fate, or repeat the Demon God's mistakes? A love disaster spanning eternity is about to unfold in the prehistoric world.