Deirdre is a 16 year old music prodigy and is also painfully introverted until she meets Luke and with a little magic, convinces her into a duet. She soon discovers some magic of her own that leads to the discovery that Luke is a gallowglass, a soulless assassin for the faerie queen. (Her family has been tormented by faeries for generations.) She eventually must choose to risk her own life to free his soul. Good book, great book to recommend to Twilight fans but not TU.