Never take a faery bargain. Nissa learned this lesson long ago, when she and her princess lover, Rowan, asked a faery for a happily ever after and ended up immortal. Five hundred years later, Nissa hasn't aged a day, though her relationship with Rowan ended due to a messy breakup. Living alone in her tower for hundreds of years, Nissa has sworn never again to deal with faeries. But then her ex-lover shows up at her doorstep once more, pleading for her help. She claims that the faeries are no longer content with occasionally meddling with the human world. They're raising armies to destroy the human kingdoms once and for all. Nissa and Rowan are the only humans still alive who know their ways- and who can stop them before it's too late.