Wanted: A Black Widow Story

Thea is not your average eighteen year old. Abandoned as a baby and taken by Dreykov himself, Thea grew up in the Red Room as the test subject of revolutionary physical and chemical manipulation. A trained killer since birth, she has never known any kind of free will or choice. Until now.
Eventually escaping the Red Room, Thea ran and started a new life, free from her treacherous past. It has been four years now of being able to live freely from others' grasps. Until one day a familiar face pops up at her school, and suddenly nothing seems simple anymore.
Will Thea be able to keep up her double life, or will her past finally catch up with her? Who will capture her, and who will keep her? Hydra, the Red Room, and SHIELD are all willing to battle over this one girls life, but who will win? And why is she so important?