Rue Silver's life is not what it appears to be. Her mother is a faerie, and has been taken back to the faerie realm. As Rue goes to bring her back, she must travel deep into an inhuman world. At the same time, the faerie realm is venturing into our world too, and taking its toll on those Rue loves. When her grandfather's plans threaten Rue's city, she realizes that she's the only one who can stop him. But is Rue a human or a faerie? Where does she fit? How does she know the difference between love and enchantment?

Rue Silver’s life isn’t at all what it appears to be; her mother has disappeared --- and her father is being blamed for her murder. Is he guilty, or is there another truth behind it all? Rue digs deeper into her family’s past and makes a startling discovery: her mother is a faerie, and she’s vanished back into the faerie realm because of a broken promise. In order to save her, Rue must defeat a dark faerie --- who threatens our very mortal world.