After a tumultuous ending in "Insurgent," Peter (Teller) is back on the right side of history alongside Tris and Four. Together, they explore the world that exists beyond the wall. At first, it seems like they've finally found a place they can call home. Then the truth quickly unveils itself. Their group will have to decifer friend from foe and honesty from deceit as they seek out a way to restore humanity back home.