Seventeen-year-old Elena has a voice in her head that tells her what she needs to do in order to be perfect: Put on her makeup. Be charming and poised. Make top grades. Work two or even three jobs. And never, ever eat. This is the voice that she calls her conscience. And listening to it just might kill her. As Elena's body starts to break down and she goes from one hospital to another, she comes to understand that her inner voice is her greatest demon....