Tris wakes up in a destroyed, abandoned city with only one memory. And that memory is of a man named Tobias. Desperate for answers, she sets out to find him, though she finds that the crumbling world around her may prove that task to be difficult. Alliances are formed. Choices are made. War breaks out, and Chicago is heavily involved. Tobias must balance leading a city, commanding an army, and getting his wife back. Tris faces many obstacles and hazards along the way as well, but she pushes through, determined to find her way back to him.

"I was wrong. Some people can be mended. Others of us are damaged beyond repair." Three years after the tragic death of Tris, Tobias is still grieving. He puts on a fake front for everyone around him, pretending that he is fine, when he is actually burying his pain in drinking and struggling to get through each day. But when secrets about the Bureau of Genetic Welfare start to emerge, people will need Tobias's help to uncover the truth and stop the corrupt government once and for all.