Tally Youngblood is about to turn sixteen, and she can't wait for the operation that turns everyone from a repellent ugly into a stunningly attractive pretty and catapults you into a high-tech paradise where your only job is to party. But new friend Shay would rather hoverboard to "the Smoke" and be free. Tally learns about a whole new side of the pretty world and it isn't very pretty. The "Special Circumstances" authority Dr Cable offers Tally the worst choice she can imagine: find her friend and turn her in, or never turn pretty at all. The choice Tally makes changes her world forever.