During the highly competitive initiation that follows, Beatrice renames herself Tris and struggles alongside her fellow initiates to live out the choice they have made. Together they must undergo extreme physical tests of endurance and intense psychological simulations, some with devastating consequences. As initiation transforms them all, Tris must determine who her friends really are--and where, exactly, a romance with a sometimes fascinating, sometimes exasperating boy fits into the life she's chosen. But Tris also has a secret, one she's kept hidden from everyone because she's been warned it can mean death. And as she discovers unrest and growing conflict that threaten to unravel her seemingly perfect society, she also learns that her secret might help her save those she loves . . . or it might destroy her.
Tris's initiation day should have been marked by celebration and victory with her chosen faction; instead, the day ended with unspeakable horrors. War now looms as conflict between the factions and their ideologies grows. And in times of war, sides must be chosen, secrets will emerge, and choices will become even more irrevocable--and even more powerful. Transformed by her own decisions but also by haunting grief and guilt, radical new discoveries, and shifting relationships, Tris must fully embrace her Divergence, even if she does not know what she may lose by doing so.
Then she meets Logan's twin brother, Caleb, who was expelled from his last school. True, he's a bad boy, but Harper can't shake the feeling that there's something deeply sinister about him--something dangerous. When Logan starts pulling away, Harper is convinced that Caleb's shadowy past is the wedge being driven between them. But by the time she uncovers the truth, it may be too late.