~Tainted Hearts~ (Bucky Barnes x OC)

Maria is Natasha and Yelena's younger sister, at age six she was taken to the red room to be trained as one of the most famous and dangerous assassins of all time The Black Dalia.
By 18 Maria is considered a dead woman is most countries and the most dangerous killer in Russia. 
Maria was trained by the infamous Winter Soldier. Over the time the spent together sparring and training Maria noticed something was different about him, that maybe he's not the cold blooded killer that everyone thinks he is.
Soon enough Maria and the soldier from some sort of bond, nothing too impressive just not beating up each other as hard or silently praising one another.
Until one day shes ripped from the red room by Hydra an even worse group of people.
They say all the want is to train her right and make her stronger so they start to experiment on her.
The next three years is pure torture for Maria, brain wipes, contact with many infinity stones and endless amounts of pain until shes given a life changing assignment...
To kill the avengers and if her mission is not completed it's her life or theirs...

COPYRIGHT © TO MARVEL THE ONLY CHARACTER I OWN IS MARIA MOST OTHER CHARACTERS IN THIS BOOK BELONG TO MARVEL STUDIOS