Told in alternating points of view from a white girl and a black boy attending the same elite private middle school.For sweet, overweight Kirsten, the world is crumbling. Her parents are barely speaking to each other, and her best friend is falling under the spell of the school's queen bee, Brianna.For charismatic Walker, the goal is to survive as one of three African-Americans in the school his mom sends him to because she thinks he's going to screw up like his cousin.Brianna keeps messing with Walker's best friend, Matteo, who for some reason will do absolutely anything she asks. When Kirsten and Matteo first become friends, it's mostly just to fend off Brianna. But the book takes a dramatic turn when Kirsten discovers a secret her parents and Walker's mom have kept for twelve years.