Tobias faces one of his biggest fears, one he never saw coming-a baby. When Tris and Tobias have a son, and a new onslaught of initiates are in dire need of training, both new parents and their friends are pushed to the breaking point. Tie in an emerging war and some disastrous situations that may leave everything in ruins, and the term "Dauntless" doesn't sound so daunting at all.