She is sinister, he is evil, she is cold and charming, and he is noble. She is ruthless and affectionate, he is affectionate and passionate. They are demons and brother and sister. When the sister's life meets fire, when the brother's water meets rain, fate has already set an ending for everyone. Is it a beautiful fairy tale or a cold reality? When the secret is revealed, will the parallel lines intersect? When the conspiracy succeeds, will the couple be separated? The dark night and the fairy tale begin!