After the experiment is over, Tobias Eaton lives in the newly settled Chicago. When his mother arrives in the city, he is afraid she might threaten the peace in the city. Along with this, Tobias still feels grief over the loss of Tris. Will he be able to save the city and deal with his grief? This story is told in "then" and "now" parts. The Then parts being before the epilogue of "Allegiant" and the Now parts take place after the epilogue.