The Missing Avenger

At the very moment she walked out that door, her past said hello to her and to her fellow Avengers.

The Avengers discovers things from the Black Widow's past, things they can't believe. They don't know how Natasha was able to do and survive those things.

The Black Widow thinks she's running towards her enemies but the truth is she's running towards death...

And The Avengers will stop at nothing to save her.