Donghuang Taiyi and the Nine-Tailed Celestial Fox were once the supreme god and spirit fox of the Heavenly Realm. But their forbidden love enraged the laws of heaven, and they were sentenced to endure nine lifetimes of romantic tribulations. In each life, they might be childhood sweethearts, lovers from enemy kingdoms, or a human and a demon from different worlds. They love each other, yet can never stay together. Until their ninth life, when he becomes Chen Changsheng, a junior officer in the Demon Suppression Bureau, and she takes the form of the fox demon Hong Yu. The two meet once again.
Yet a greater conspiracy lurks behind their reunion. Fragments of the Chaos Bell are scattered across the three realms, and dark forces are stirring, intent on devouring the universe. Once Donghuang Taiyi and the Nine-Tailed Celestial Fox regain their memories, they discover that they are not only the protagonists of nine lifetimes of romantic tribulations, but also the key to saving the three realms.
From the mortal world to the Heavenly Realm, from the demon world to parallel universes, they join forces to uncover the secrets of the Chaos Bell and thwart the Chaos Demon Venerable's scheme. In the end, they wield love as their strength and seal the black hole that threatens to devour the universe.
