Shortly after the trial, Eric and a Dauntless patrol unit loyal to him, raid Candor headquarters. They inject everyone with a device that renders all but the Divergents unconscious. Tris meets up with a little girl who she directs to wait in an area that is at the moment safe. Eric finds Tris and several other Divergents, including the little girl. After testing them, he kills the little girl, and at least one other person for being not Divergent enough to be useful to him and Jeanine. He realizes that Tris is 100% Divergent, and arrests her to take her back to Jeanine. Four kills Eric, rescuing Tris, and the group returns to the Factionless to ally with their leader (Evelyn), who is revealed to be Four's mother.
Jeanine tries to force Tris to hand herself in, in hopes of being able to force her to open a box she thinks will prove that Divergents are a problem. She is sucessful in getting Tris to turn herself in, however when Tris finally gets the box open, Jeanine is mortified. The message in the box actually proves that Divergents are very important and are the reason the walled city was created. Evelyn ends up taking over Erudite's headquarters, and kills Jeanine.