Ok, so this is my first fic, so please take it easy on me. I know most people don't like OC's but this story has one and it mainly revolves around her and her relationship with Callen with just as much Kensi and Deeks. I'm not sure how well I'll be able to keep them in character so please, bear with me. I LOVE constructive critisism and suggestions. Also, if you're willing to beta, please let me know! It's going to be pretty long. I've got this chapter and the next moving along well. Not sure how long it's really going to be as it's still under development in my brain. :) Disclaimer: I don't own NCIS: Los Angeles or it's characters. The only thing I own is JD.

Worth Fighting For

"Federal Agents, stop right there!"

Kensi yelled burst around the corner to an alley in downtown Los Angeles with her partner, guns drawn She and Deeks were tailing a suspect until said suspect had stopped to speak with a woman whom they assumed was the one that they were following their suspect for 3 hours to find. The woman whom the suspect was talking to was tall, probably 5'8 or 5'9, not skinny but very built, she obviously worked out A LOT. She had dark brown hair that came around to be seen beneath her light blue hoodie. She was either trying to hide the fact that she was a woman, or just hide her face.

JD was SHOCKED, to say the least. The last person she had expected to walk around that corner was Marty Deeks. She had been expecting NCIS to follow her informant but was not expecting them to catch on to her informant so easily and so soon, much less that one of the ones following him was Marty. This was going to make things EXTREMELY complicated. She wa1s being watched by her "employer" and if she let her real identity be known, her 3 years of undercover work, and all the heartache, pain, and loss that came with it, would be all for nothing. Her faster than average mind raced the hundreds of possible outcomes and ways to get out of this scenario. She came up with several but only one of which would be extremely helpful to her mission but she really didn't want to do it because it involved hurting someone. However, sacrifices must be made in order to complete her mission and if she were to pull it off, she'd have to take out her informant, or at least make it look like she had. Also, the only way for it to work would be if Marty hadn't recognized her yet which the chances of him recognizing her with her hood up were slim to none.

It had only been about 15 seconds since the agents had come around the corner and her informant standing between her and the agents was giving in. With his hands up he waited for the two agents to approach him. Without a word and in an instant she was behind the man, her hidden knife sliding smoothly from it's sheath strapped to her side and before anyone had realized it, she'd stabbed the man in the back. His eyes were wide with shock and pain as he swayed and before he even began to fall she had pushed him towards Marty so he had to dodge the falling body instead of aim and shoot at her. That was all the time she needed. As the informant fell onto Marty she quickly ducked below Kensi's gun as she tried to fire a shot but JD was fast and before Kensi knew it, JD had grabbed one of Kensi wrists with her left hand and jerked Kensi to her hard, sliding her left leg in front of the agent to force her to trip and fall forward. As Kensi fell, JD twisted and used the momentum from her turn to push Kensi down with her right hand. Kensi hit the ground hard on her stomach with a little grunt. This also caused Kensi to loosen her grip on her gun and JD wrenched it from her grasp as Kensi had fallen. By the time Deeks recovered, JD had already stepped over Kensi to run back up the alley, shoving Kensi's gun in her pocket.

There was no way they could catch her now if she didn't want them to. She was in her element: a free runner's paradise. You could call free running her hobby in her off time, but when she was at work, it served her well. Where someone saw an obstacle, she saw a way to jump over it. But she wasn't moving at top speed. She knew that Marty could recover fast enough to catch up to her at the pace she set and Kensi was down for a good bit, probably with the wind knocked from her. JD hadn't put ALL her force into punching Kensi, she only wanted Kensi to go down long enough for JD to get away and Marty to follow. Kensi's pride would hurt more in the morning that the force of the fall. Since she was being watched, she needed to make sure her employer new she got away from the agents and give Marty a chance to catch up with her to talk.

She jumped over fallen trash cans and dove around corners, loving the adrenaline and freedom of just RUNNING. She had to remind her self to keep it at a slower pace so she didn't get too much ahead. After she turned down her 7th or 8th alley she figured she was far enough away from prying eyes and ears so she jumped on top of a dumpster, grabbed a poll from some scaffolding to a building that was undergoing renovations to swing up to land above the alley. And this is where she crouched to wait for Marty.

"Kensi!" Deek's yelled at his partner as he saw her go down and as he caught the stabbed man and lay him on the ground. He could tell right away the stab wasn't life threatening if they could stop the bleeding.

"I'm fine... go after her." She barely got out as she rolled over on the ground trying to breath.

"Her?"

"JUST GO!" Kensi yelled at Deeks as she tried to catch her breath.

"Alright fine!"

Something was strange about this whole thing. The people they were after weren't known for letting people go this easily. The person, now known to him as a woman, had stabbed her informant but not to kill him and she could have easily killed both him and Kensi in that moment she had caught them off guard but chose to run instead.

He stood and watched as the woman disappeared around the corner at the end of the alley. He ran to the corner he saw her disappear behind and stopped to peak around. He knew now she was armed because she had taken Kensi's gun so he didn't take any chances. He put his back against the wall and leaned out to peak around the corner and saw a flash of light blue leap up onto a dumpster at the end of the alley and up over a fence. He didn't hesitate to give chase as it didn't seem that she was going to turn around and shoot. He reached the dumpster and fence at the time she disappeared around the next corner.

It took him a bit longer to get over the dumpster and fence than it took her. The woman was obviously trained in evasion. He smirked as he landed on the other side of the fence.

"That's probably another one of those classes I didn't take."

He went back to serious business as he neared the next corner with his gun drawn. There were more alley's and more corners that he carefully went around and each time he'd get a glance of the light blue flash. Finally he reached a corner where he heard what sounded like stomping on a dumpster before there was a short series of noises he couldn't quite make out before it got quiet . He leaned out to look Nothing. No sound or site of the woman but she had to be in the alley still because it was a dead end. Time to do what he did best: Talk.

"Alright lady, this is the end of the road! Come out, you've got nowhere to go!" He yelled from around the corner.

"Fine, just don't shoot me. I'm on your side, Marty."

While he was still around the corner she jumped from her perch 10 feet above the ground to her feet and into a roll that had her standing in the middle of the alley, her hands in the air in surrender.

He'd heard her jump and land and waited until he heard no more movement before peaking back around the corner. He saw her standing there with her hands up but still couldn't see her face. He wasn't taking any chances. And how the hell did she know his name? This whole situation was getting way out of hand in the weird department.

"I normally don't shoot women but I just saw you stab a man in the back and that tends to leave me a bit nervous. Just toss my partner's gun and any other weapon you may have on the ground and I wont have to break my code and shoot a woman."

JD smiled, "I'm so proud of you! You were NEVER this careful back then. I guess becoming a cop has changed you for the better." She slowly reached into the front pocket of her hoodie and removed Kensi's gun with two fingers then made sure the safety was on before she tossed it to the side. She did the same thing with her .45 that was in the custom made holster at the small of her back. It was well hidden and stayed in place when she was free running.

"Okay Marty. You heard them hit the ground, that's all I have." She put her hands back up to make sure he knew that she wasn't going to try anything.

At this point Marty felt safe enough to come from around the corner, his gun trained on the woman.

"Alright now turn around and put your hands behind your back."

"Aw come on Marty! Aren't you curious as to who I am? Don't you want to see my face?" He could see her lips turn up in a smirk from the shade of her hoodie. He hadn't seen her whole face yet, what could it hurt, right?

"Alright but remember I know how freaky fast you are and that makes me a bit trigger happy."

She slowly moved her hand to her hood and pushed it back, revealing pale skin, dark brown hair, and familiar deep blue eyes. It took all of 5 seconds to realize he recognized her. His eyes got a little wide.

"I do know you..." JD could see the gears turning in his head as he lowered his gun a few inches.

"It's me Marty, it's JD. Don't you remember me?"

Realization hit him like a ton of bricks, "JD? What the hell are you doing here?" He knew better than to completely lower his gun because he wasn't sure what she was here for. She could have taken a wrong turn down the line and become one of the bad guys. It'd been 15 years since he'd seen her last so it was a possibility.

"JD, what's going on? Why are you with an informant for the Russian Mafia?" He kept his gun pointed at her and she still stood there, hands up and not moving.

"Well, I'm on a long term undercover assignment for a certain organization. I can't talk about it with you until you've gotten the right security clearance. Call your boss and tell them who I am, JD Daniel agent number 97532, and for them to call the Director of the CIA and then we can talk more about why I'm here."

He relayed the message to Eric through the earwig.

"Alright, I'll tell Het-"

"Stand down. I know Ms. Daniel. She's on our side." That was Hetty herself that had cut Eric off. She must have been in the ops room and heard Deeks relay the information about JD.

With a big sigh of relief and a huge grin on his face, Deeks put away his weapon and began walking towards JD.

"Looks like my boss knows you, JD."

She returned the smile and ran to him and wrapped her arms around him in a huge hug.

"It's so good to see you again Marty! It's been too long!" He picked her up and spun around with her.

"I know! And hey, what happened? I waited there for you that summer but you never came. I wrote you and called but you never responded."

A look of pure sadness darkened her features as he set her back down, "It's a long story Marty, one that we'll have to go into later. I've got to report back in with my boss... and not the one good one." She smiled as she retrieved her gun as well as Kensi's. "He was expecting to hear good news from this informant but you guys showed up before I could get the intel. Maybe we can work together on this. See if you can get-"

"Woh there, JD. I haven't seen you in almost 15 years, isn't it a little soon to be asking for favors?"

She smiled as she turned to give Kensi's gun back to Deeks, "Like I said, I don't have time to go into details. I know I didn't kill the informant but they need to believe that I did. Just hang onto him for me until I can meet with you again. I think we all could benefit from working together." She handed Deeks his partner's gun and holstered hers again. "And can you tell your partner I'm sorry that I had to hurt her?"

He nodded as he frowned at her, "I will." She was still the same old tough JD she had been when she was a teenager but somehow she was more distant which could probably be because they hadn't talked in a long time.

"I can't get away from my... undercover op until early morning. Can one of you you meet where we always met at 2am?" She paused, "There's a lot we need to talk about and it'll look like I'm meeting another one of my informants. It can't be you or the the other woman because they more than likely are looking both of you up right now."

This time she was close enough to Marty for Hetty to hear her over his earwig and before any of the guys could speak up, she was telling them what to say to JD.

"Tell Ms. Daniel that Mr. Callen will be there at 2am. The safe phrase is 'Arashi no yoru ni.' And tell her I look forward to seeing her again and to please be careful. I'm sure that us stumbling onto her operation and revealing herself to us has put her in more danger than she already was."

Deeks relayed the message, stumbling a bit over the Japanese but JD understood what it meant and nodded her understanding as she put her hood back up to cover most of her face.

"Don't worry. I wont let 3 years of undercover work go to waste." She a small two finger salute wave and smirked before leaping back up on the dumpster then swing back up the scaffolding like she had moments before. Deeks watched as she maneuvered her way gracefully up to the roof of the building before leaning back over the edge to yell back down at Deeks, "By the way, you're one lucky bastard. She's HOT!"