The Erudite and the Dauntless traitors arrive at the Amity compound to search for Abnegation members. The remaining Abnegation members, Tris, Tobias, and Caleb disguise themselves as Amity. Their ruse is discovered, however, and they run; most of the other Abnegation are shot to death. Tris, Tobias, Caleb, and Susan escape. In the battle, Tris couldn’t bring herself to use her gun; Tobias notices this and challenges her about it. However, Tris did save Peter’s life by pushing him out of the way of a bullet.

The escapees jump onto a train heading into the city. It contains armed factionless, including Edward, the Dauntless initiate who left after Peter stabbed him in the eye. When the factionless order them to jump off the train or be killed, Tobias tells them that his name is Tobias Eaton. The factionless immediately stand down. Edward escorts them to a factionless safe-house, where they are greeted by Evelyn, the leader of the factionless and Tobias’s mother. 

Evelyn asks Tobias to join her group of factionless, who want to destroy the faction system. Tobias doesn’t agree with this goal, saying he’s chosen Dauntless. Later, Tobias tells Tris that he’s known for about a year that his mother is alive; he’s still angry with her because she left him behind with Marcus instead of taking him with her when she left.