Nya is an orphan struggling for survival in a city crippled by war. She is also a Taker—with her touch, she can heal injuries, pulling pain from another person into her own body. But unlike her sister, Tali, and the other Takers who become Healers' League apprentices, Nya's skill is flawed: She can't push that pain into pynvium, the enchanted metal used to store it. All she can do is shift it into another person, a dangerous skill that she must keep hidden from forces occupying her city. If discovered, she'd be used as a human weapon against her own people.

Rumors of another war make Nya's life harder, forcing her to take desperate risks just to find work and food. She pushes her luck too far and exposes her secret to a pain merchant eager to use her shifting ability for his own sinister purposes. At first Nya refuses, but when Tali and other League Healers mysteriously disappear, she's faced with some difficult choices. As her father used to say, principles are a bargain at any price; but how many will Nya have to sell to get Tali back alive?

Part fugitive, part hero, fifteen-year-old Nya is barely staying ahead of the Duke of Baseer’s trackers. Wanted for a crime she didn’t mean to commit, she risks capture to protect every Taker she can find, determined to prevent the Duke from using them in his fiendish experiments. But resolve isn’t enough to protect any of them, and Nya soon realizes that the only way to keep them all out of the Duke’s clutches is to flee Geveg. Unfortunately, the Duke’s best tracker has other ideas.

Nya finds herself trapped in the last place she ever wanted to be, forced to trust the last people she ever thought she could. More is at stake than just the people of Geveg, and the closer she gets to uncovering the Duke’s plan, the more she discovers how critical she is to his victory. To save Geveg, she just might have to save Baseer -- if she doesn’t destroy it first.