Divergent, the film.
Based on the novel of the same name by Veronica Roth.
When she starts her new life in her new faction, she changes her name to Tris.
She is in danger because she is divergent.
In the battle, Tris' parents die.
Tris and Four destroy the system of Erudition that controls the Dauntless and scape together with Caleb to Amity.