Safe and Sound

When Natasha Romanoff becomes a trainee in SHIELD saved from her past and vicious killings a child... when SHIELD doesn't accept her she feels hurt, and wants to runaway from the teasing of the other agents... but Clint Barton steps into her life as a friend rather a foe she finally realizes that through all that taunting there is still the kindness of a friend that she has never had. Will Natasha prove friendship to Barton or will her old past haunt her forever?