My assassin girlfriend (widowtracer au)

This is only AU because I know there are a couple times mistakes and stuff.

Overwatch has been reactivated as an underground militia,recruiting former members and the best of the best from around the world.
With a new base hidden in the wilderness of north eastern Canada they take jobs from anybody who will give them,morally wrong or not,so they can get big enough to defeat Talon
Lena Oxton came as soon as she could,and has been helping the effort to rebuild Overwatch.