"Sixteen-year-old Sage is a lonely child. Her adoptive parents watch her obsessively, as if studying her for warning signs of...something. And maybe they're right to--even she can't make sense of the strange things she sees and hears. She possesses knowledge that other teenagers don't, that her parents and teachers--no adult--could possibly have. So when Sage finally makes a friend who understands her alarming gift, he becomes her confidant, a precarious...