The Dauntless Mystery- Divergent High

"And that's when it hits me.
I have no where to go.
No one to turn to.
It's dark and I'm alone.
And I nearly died."

After a life threatening experience with his dad, 10 year old Tobias Eaton had no choice but to flee.
He spent the morning on the streets, until a man dressed in black and dark red found him and took him back to a compound with him.
This is Dauntless.

Five years later:
15 year old Tobias Eaton has a mission. A dangerous one, and if it's not completed, then Tobias will be in grave danger.
He's sent to a boarding school to complete his mission. This school is known as Divergent High. He enters with a new identity.
Four.
Mysterious and reserved, Four must complete his mission whether he wants to or not. But, what happens when he becomes close with the girl who is reason he went to Divergent High in the first place? Will he be able to bring himself to finish his mission? Or will he put himself in danger for her?
I don't own Divergent.
Note: Tris, Tobias and all the others are the same age in this story.