Tris (Shailene Woodley) must escape with Four and journey beyond the wall that encloses Chicago. For the first time, they leave the only city and family they have ever known in order to find a peaceful solution. Once outside, they learn shocking new truths that render old discoveries meaningless.

As the ruthless battle threatens humanity, Tris and Four quickly decide who to trust in order to survive. Tris must ultimately make impossible choices about courage, allegiance, sacrifice and love.