The faction-based society that Tris Prior once believed in is shattered--fractured by violence and power struggles and scarred by loss and betrayal. So when offered a chance to explore the world past the limits she's known, Tris is ready. But will she be prepared to face impossible choices about courage, allegiance, sacrifice and love?

Cinder, a gifted mechanic and a cyborg with a mysterious past, is blamed by her stepmother for her stepsister's illness while a deadly plague decimates the population of New Beijing, but when Cinder's life gets intertwined with Prince Kai's, she finds herself at the center of an intergalactic struggle.