Chapter 1: S.H.I.E.L.D. Headquarters

Natasha was just walking through the subway tunnels back to one of S.H.I.E.L.D. headquarters. This one was really strange, an underground headquarters. But she had seen aircraft headquarters, underwater headquarters, etc. So to her, this one wasn't strange at all. It wasn't her main but it was the closest to where she was and since she was badly injured on her right thigh, left arm and a long cut on her chin, she couldn't walk straight. "All in a day's work," she would say. The place was so bleak, distant, dark. A place of drug dealers and smugglers in corners doing their "business". Natasha saw a few of these kind of people. She scoffed and kept walking. 5 minutes later she, a group of guys (about 4 or 5) started to crowed her in a circle. They blocked her way.

"Where ya goin' Doll face?" One of the guys said slowing stepping forward. Natasha said nothing and tried to walk forward but felt someone's chest bump into her head. She started to get annoyed.

"Someone with such a pretty face shouldn't be roaming around the subway tunnels alone. Maybe you should stay with us for the night, huh?" As he said started to touch her face, Natasha quickly grabbed his hand, twisted it and it started to sprain. He squealed helplessly,

"Aaaaeeekk!" As she finally let go, she immediately sucker-punched him straight in the nose. He fell to the ground unconscious.

"She knocked out Laser!" One of the guys said and they all charged at her. She couldn't help but smirk a bit at the fact they chose to fight her. And also because the guy's name was Laser. The first two guys that charged at her were kicked into each other. She stepped on one of the guy's foot with her really sharp heels. He squealed in pain and got punched straight in his chest. He wheezed and tried to breath but it was too late. She head-butted him and he fell straight to the ground. She flipped over the other guy in front of him and did a scissor-kick in his groin.

"Motherf-" He started to say. But then she sprained his ankle straight with her hands and he fell. She got up and turned around slowly to see the last guy quietly whimpering and immediately ran away. She smirked again and looked at her wounds that have gotten worse. She sighed and picked up her bag, brushed her coat off and continued walking off through the subway tunnels.

Once she reached the platform, she jumped on the train tracks and said,

"Agent Natasha Romanoff S.H.I.E.L.D." Suddenly a keyboard under a few blocks of coal slid open and she typed in the password. Once she pressed ENTER, the secret door opened. She was about to get inside when she heard the chugging and the tooting of a train on the track that was about to smash into her. She gasped and quickly forward-rolled in and closed the door just in time before the train could smash into her. She looked around the room that was filled with computers and people working, trying to find him.

"Natasha!" Said a voice behind her. She turned around to see who it was. It was him.

"Clint!" She yelled and they hugged each other until it got embarrassing. They finally let go.

"What are you doing here at this S.H.I.E.L.D. headquarters?" He asked confused.

"I'd like to ask you the same thing." She said then grunted and held her wounds.

"Oh my God, you're hurt." He said looking worried. It was confusing for her because she would return at headquarters with a dislocated shoulder and a broken leg and that would be normal. But these were just bad bruises and Clint is looking like she almost died or something. She then smirked and said to him,

"Clint, you know it's nothing I can't handle." She started to walk around the room just slightly limping a bit.

"I'll take you to the medics room, we will talk there." He said helping her walk which she really didn't need but he insisted. Once they got to the medics room, he layed down Natasha, closed the door and started to pour water for her wounds in a basin.

"You really don't have to do this Clint, you know I usually sleep these kind of things off." She said as he damped the cloth in the basin and gently tapped it on the wounds.

"I know. We just can't afford anything bad happening to us. Fury said something is going to happen, something bigger than before. Which is why he called us in. He's here in these headquarters too." He started to say and put his head down.

"What do you mean? When did he tell you this?" She started to worry. Suddenly all the lights turned off.

"AHHHHH!" Someone screamed from across the hall.

"They're here! The Chitauri are here!" Another person screamed. Clint and Natasha immediately sprung into action. The got their weapons and were ready to attack. They started to fight, there were loads of them coming out of nowhere. They just kept flooding in and in and in. There was know stopping them. But she knew. They both knew. They couldn't stop. It was fight to the death. Stop. Said a voice inside her head. She gasped. Stop fighting Natasha. They do you no harm. Just let them take what they want. She shuttered. Then the whole room started to spin. And she fell down on the floor. She couldn't breath properly. All the sounds she heard were faint. She heard faint shouting from Clint.

"Natasha! Natasha, are you ok? Stay with me Natasha. Please. Natasha!" Her eyes started to close and she couldn't hear a sound anymore.

The next morning came and she woke up on the medic bed again. She slowly started to open her eyes.

"Natasha?" Clint asked sitting on a chair next to her, holding her hand. His voice sounded like shattered glass. It felt like the worst hangover in the world, but she didn't drink anything. He pointed to a glass of water and she drank it. She took a deep breath trying to fight her headache.

"What happened last night?" She tried to croak out.

"The Chitauri came in and ambushed us. They didn't kill anyone and just fought us because we were in the way. We don't know what it is but they seemed to have been looking for something."

"Or someone." A voice said from behind us. It was Agent Maria Hill. She looked devastated and looked like she was about to cry. But didn't, of course.

"What do you mean?" Clint asked. He and Natasha both had confused looks on their faces. She gulped and tried to say without crying,

"They took Fury."