Tris (Shailene Woodley) escapes with Four (Theo James) to journey beyond the wall that encloses Chicago. For the first time, they leave the only city and family they have ever known. Once outside, they learn shocking new truths that render old discoveries meaningless. As the ruthless battle against David (Jeff Daniels) threatens humanity, Tris and Four must quickly decide whom to trust to survive. Tris must ultimately make difficult choices about courage, allegiance, sacrifice, and love.