Every 16 year old is deciding which faction they would like to join.
Beatrice learns she is divergent and struggles with it through the story
Tris goes through the dauntless initiation process and sees Newspaper articles are released about abnegation was corrupt
Tris completes dauntless initiation and is injected With the serum which causes them to attack abnegation tris and tobias are divergent and get attack while attempting to saving parents
Her mom saves her but dies trying to protect her. Tris is reunited with dad and brother as well as marcus The four of them break into the dauntless compound and save Todias. Her father dies while trying to take on all of the guards
Tris and her allies leave the Dauntless compound and flee by train to amity. This is the only the beginning.