It was suppose to be a simple mission. Get in, scope out the location, fight bad guys if needed and get out. Go home. It was a simple mission. Until it wasn't. Y/n and yelena joined the elite team know as the Avengers after taking out the red room. But when y/n gets placed on a mission, things take a turn for the worse. The mission had been breached and y/n ended up missing until she was pronounced dead. The avengers search high and low trying to find her body until they finally called it quits. Now 3 years later y/n returns, only she isn't the girl she once was. Cold and vicious without a care in the world who gets hurt in the process. Yet still has a warmth and comfort to her despite no longer remembering anything. Can yelena break through y/n's memory loss and make her remember her life before the accident. Or will yelena finally let her go, and let her live the new life she has now.