Blue citizens are absolutely superior to all others, especially ignorant, uncivilized Orange. Poppy has been taught this relentlessly for twelve years. But when she accidentally crosses the forbidden border and is befriended by Marigold—a tangerine-skinned girl—and her kind-but-quirky family, Poppy is forced to rethink everything. Questioning that Blue is Best or the rest of the 50 Rules governing Poppy’s world would get her sent to a dangerous Detention Center. Or worse. But how can she return to her blindly obedient, anti-Orange life now that she knows the truth?