What kind of obsession with love and hate makes this love sleepless for hundreds of years? What kind of thrilling experience caused him and her to break through the boundaries of identity and race between them and become closely dependent on each other? He is the prince of the demon world, the most bright and beautiful man in the entire demon world. He is powerful and arrogant, but underneath his seemingly beautiful and gentle face is an astonishing indifference and ruthlessness, disdainful of love. Will such a cold heart eventually be melted by the stubborn and bright her? He and she met by chance, and once they looked back, they were destined to commit to that life. Demon, that word that is hated and even feared by people, is destined to be revealed step by step at this time. In the end, who will pull this red thread called love to the end?