I do not own this

The enemy agents took a while before they realised they were coming towards them, but when they did, they were ready. The two nearest reached them first; they had a pair of guns out each and were pointing them threateningly. Their message was clear – Don't come any closer, or they'll shoot. The thing is, the Romanoff sisters don't take kindly to being threatened. Natasha made the first move. She kicked one of the guys gun out of his left hand in an instant, before turning to avoid the gun in his other hand as a bullet began to ricochet off. She ducked another bullet before whirling around him so that she was behind. The man was disorientated for a moment, so Natasha took her chance and pounced him to the ground. A few seconds later he was dead – she wasn't called the Black Widow for being no good at fighting after all. Every move she made was so graceful, as though she was a dancer and this whole thing had been choreographed. Every attack she made was perfectly positioned to make the most impact. Then she began to pick off the other agents… one by one… as they fell like dominoes.

However Isabella couldn't worry about any of this; she was in her own battle with the other guy. She whirled the iron bar she had found in her hand, getting used to its feel before she lashed out and began to fight too. She swiped the bar around, knocking the guys right hand gun out, and in the same motion, she grabbed hold of the other gun and tugged it free from his grasp. Carelessly, she chucked it to the side. The man's face sneered at her. He raised his right fist and thrust it forward towards Isabella's face, however a hand blocked his path. She raised the iron bar again and swiped around his legs, causing him to fall to the ground in agony. Realising his defeat, he said,
"please," as he begged for his life.

Isabella should kill him, she really should. But you see, Isabella hadn't killed anyone since… well you know when. Guilt spread out from her heart like wildfire, as she wondered what to do. Though only seconds had passed, in that instant an internal battle took place within her…

"Kill him, you know what he would do otherwise"
"But its wrong to kill. You promised."
"you say that but he will just come back and kill you till you do it. – Its kill or be killed"
"Its still a human life."
"he's the bad guy"

The internal struggle that had plagued her when she was with Clint played again. It overwhelmed her mind, as so many arguments came to her head. Then, in amongst all this chaos, another voice took place. It belonged to her sister, just before she left her from the SRP:
"Isabella," Natasha had said long ago, "One life could save many more you know." At the time, Isabella had always been confused at what she had meant. In fact, many a night it had haunted her dreams as she tried to untangle the mystery. But now it all made sense. Killing this man would be for the greater good. – picking up the gun that she had previously tossed aside, she shot the man dead.

Then the real fight took place:

The men kept coming. She was no longer afraid of killing them, but that didn't make it any easier. Her moves became repetitious: block, slash the bar, duck, poke… It went on. They say in stories that when action occurs everything seems to slow down, but Isabella found the opposite. In her opinion, everything speeds up. Her mind would barely know what it was doing before she was dodging another attack or bashing the bar around. Her senses sped up – she could see exactly where every person in the room was without even thinking it.

As she took down one guy, she registered Natasha taking down another in a far corner. She couldn't help but notice a big bloke creep up behind Nat, getting closer and closer. Yet Natasha didn't react to him – she didn't even though he was there.
"Behind you," Isabella shouted out to her, but it was no use. She couldn't be heard, and she was too far away –she'd never reach her in time.

However luck was in her favour it seemed, for at that many moment an arrow came whizzing through the air and took down the agent in one foul swoop. Glancing up at the source, Isabella saw a man dressed all in black, clutching a bow in his hand enter the room: It was Clint.

"Thought you wouldn't invite me to this party then Isabella." He yelled when he saw her looking.
"I don't exactly see how this is a party." Isabella replied as she once more engaged in the battle

Adrenaline rushed through her, energising every cell in her body. She had never had a chance to enjoy this feeling before, but now she relished in it. Despite all the danger, this was fun. Most of the other office members had fled the room now, for they weren't trained for this sort of thing, but a few remained, taking down one or two men here or there. Before long the enemy had been defeated, and Isabella chucked her weapon to the side

A man stood in the middle of the room with an eye patch covering one eye, making him look very foreboding and definitely a guy you would not want to cross. Now that chaos had been lessened, he tried to find some order and take charge. However one enemy still remained, half hidden in the shadows behind this man. Like the guy who tried to take down Natasha, he crept forward, knife in hand. He raised it up.

Without even thinking about what she was doing, Isabella ran forward and tackled the enemy to the ground. The man, who she would later know as Fury, whirled around in confusion, as he realised his mistake. However even on the ground, the enemy was not powerless. Somehow, though Isabella would never quite know how, she found herself in a vulnerable position with her back to the wall. She had no weapon on her, yet this man had a knife, pointing straight at her heart. She couldn't move for fear, her breathing grew rapid as she realised that by saving Fury, she would have herself killed. The man his knife once more. Isabella turned away, dreading the impact – there was nothing she would do to prevent it.

The knife came closer, and closer, and closer. And then the man was gone. In his place, a women stood over her with a deadly expression on her face. For this man had almost got her sister, and no way was Natasha going to let him get away with that.

Hope you are liking the story so far. If so, please review - it would make me really happy!