A forbidden love sparks between a fairy and a demon king in this thrilling fantasy romance.Jiani is a sparrow fairy who takes a chance at becoming assistant to the immortals' fairy king. One day, she stumbles upon a mysterious prison in a treasure tower, where she unwittingly thaws the frozen Taisun, the legendary ruler of the dragon demon shifters. He has been trapped there for eons by his sworn enemy, the tyrannical king of the immortal realm. Taisun is grateful for his freedom but furious at the fairy who broke his curse. He vows to take revenge on the immortals who imprisoned him, and he decides to use Jiani as his pawn. He follows her back to her home, hating the curse that mates her heart to his. But he soon realizes their bond is more than a convenient alliance. He is attracted to the spirited fairy, who challenges his every move. Jiani is unaware that her new friend is a mighty demon. She suspects he might be dangerous but also sees a softer side to him. He cares deeply for his subjected people, wanting to return their homes and loved ones to them. She falls for the demon king despite their differences and star-crossed relationship. But their love is not without obstacles. The king of the immortal realm is furious that his enemy has escaped. He sends his armies to hunt down Taisun, unaware that if he kills him, he will kill Jiani, too. When the two fall in love despite their differences while returning to his realm, can the rule forbidding marriages between fairies and demons be reversed?