Forty-eight people survive a plane crash and must learn to work together to live on a strange island.

As the power of the island to both heal and destroy comes into sharp focus, the lines between good and evil are blurred and loyalties are challenged when the survivors of the crash become tangled within the lives of the Others.

Tris must escape with Four and go beyond the wall enclosing Chicago. For the first time ever, they will leave the only city and family they have ever known. Once outside, old discoveries are quickly rendered meaningless with the revelation of shocking new truths. Tris and Four must quickly decide who they can trust as a ruthless battle ignites beyond the walls of Chicago which threatens all of humanity. In order to survive, Tris will be forced to...