Power is seized by Tobias' mother, Evelyn. Suddenly, the truth comes out.... It turns out that the city is not a perfectly structured society, but a “reality show”. These are the mysterious people who are hiding behind the fence .. The third part . begins. Tris and Tobias, along with a group of friends, go outside their home. They want to know the truth and be free. But get straight to the... Bureau of Genetic Protection. They are met by the Bureau staff - after all, they are the ones who watch the wards from birth .. The new reality also “bites” . It turns out that in the past there was a genetic War for Purity . As a result, the world was divided into “genetically pure” and “genetically damaged” individuals. And scientists turned into obsessed monsters and began to experiment: to create artificial settlements and introduce their agents into them. The main goal of the subjects is to serve as consumables and give “genetically pure” offspring. Tris is outraged to the core, Tobias rushes in search of himself and gets involved in another alteration. And the scientists from the Bureau are again dissatisfied with . They intend to arrange a “reset”, that is, erase the memory of all residents of the city. Tris and the others decide to prevent a disaster!.. Who will win?The book was also published under the title "Faithful".