The main conflict of the story is that when Beatricefinds out she is divergent which means that she is mixed with fractions and in their society you can only be one and if anyone found out they would report it and she would be killed so she choose a fraction and tried to keep it a secret.
When Beatrice gets her faction results and finds out she is divergent. Beatrice then has to decide where she thinks she would fit in. She belongs to Abnegation, but chooses to be apart of Dauntless.
When Four finds out that Tris is a divergent when she breaks the glass during the simulation. Four helps her get through the simulations so the system won't find out. He begins guiding her and training her to hide it.
The climax is when Eric is about to kill four and Tris stop pretending to be brain washed like the other dauntless members to save Four. So Tris and four have to start fighting for their lives.
The falling action is when Dauntless and Eurdite and Abnegation go to war. When Tris is about to die her mother comes to save her. When they are fighting both of Tris's parents die.
When Tris and Four get to the dauntless control room and shut everything down. Then Tris and Four saves everyone and then ends the war between eurdite and Abnegation.