This is my first Crossover between Supernatural and NCIS Fan Fic. Be nice, Read and Review and please no flames because they are not real reviews and see them as a let me down type of thing.

Disclaimer- I don't own anything but my own characters and the plot.

Chapter 1

A 1967 black Chevy Impala choked as it came to a stop in front of a cheep motel in Trenton, New Jersey.

It was mid-night and if anyone besides the motel owner, was still awake at that hour, they could of heard the classic rock music that was blasting from the car's speakers. The motel owner watched from his office window as two young man who from his point of view were still boys, get out of their car.

"Hi how much is it a night for a room with two beds sir?" The taller man of the two asked him politely as he pulled out his wallet for a credit card.

"It plans on how long your staying here, young man. I usually charge $50.00 a night but its easier to charge some one when they are checking out. You will be staying in room 13 sir" the man said giving the shorter man the room key.

After finding their room, the two young men unloaded their car. The younger man pulled out a laptop and logged onto the internet. This wasn't one of their normal gigs.

No this time they already knew what they were searching for. Actually it was more of a who than a what. As Dean had said in a previous case: "Demons I get but people are just crazy"

Sam and Dean Winchester were brothers. Their father had been in the Army and then after their mother was murdered by a demon, their father trained Sam and Dean to kill the things that most people thought to be myths and legends.

Sometimes the people they worked with ended up either hurt, dead, or they just mysteriously disappeared into thin air. The Winchester brothers gig was just that. They were in search of a missing girl whose foster mother had personally called Sam and Dean Winchester, to find her missing foster child.

Flashback:

A girl they had found during a gig they had been on with their father had been attacked by a where-wolf. She had told them it hadn't bitten her. She also said she didn't remember her last name all she remembered was her first name was Lexi and that she was 6 years old. The Winchesters adopted her into their small family. Their father trained her just like he had trained his own kids. That had happened 16 years ago.

And now 16 years later the foster mother had called Sam about her missing 22 year old foster child. The foster mother had said in her voice message that she and her husband had adopted the child when she was five years old.

The girl's mother who had called them had found a cell number written down on a napkin in her child's room with a first and last name to go with it.

She had dialed the number and left a message on the answering machine.

Dean had wondered how the mother had gotten a hold of their cell number let a lone had known one of their real names. Sam on the other hand had called the grieving mother back, asking her what her daughter's name was and how she had gotten a hold of their information.

When the mother told him who her daughter was, he nearly dropped his cell phone. She couldn't tell him how she had gotten their information because she didn't know.

The name was all Sam really needed to hear and hung up the phone.

"Lexi Winchester is not our sister, she is Lexi Finn, the adopted daughter of a State Senator"
End of Flashback

Dean pulled his little brother out his flashback.

"Oh hiya Dean." Sam said with a small smile on his face.

"Did you find her yet?" his brother asked very impatiently.

Their father had taught then how to cover their tracks well. Their sister (as they saw her as at the time) was quick learner and quickly became the master of it. As they grew older, Lexi began to remember who she was but with John's teachings, she was a pro at pretending to be the person she really wasn't.

Both boys knew she had ran away from them when she was 17 years old. Their father had allowed her to hunt on her own. She was brilliant at hunting and the Winchesters had quickly lost track of the teenager. Her last gig had been in Pennsylvania and that was the last they had heard of her.

After that weird stuff began happening.

Sam shook his head to clear away the painful memory.

"No Dean I haven't found her yet. Dad taught her well enough to stay off the radar" Sam said sounding a little to proud of their missing sister or whatever they called her now.

"I am gonna call Bobby, Sam. Meanwhile try finding a gig here in Trenton, we need a cover while we are in New Jersey" Dean said as he dialed their friend Bobby Singer.

Bobby picked up his phone on the second ring.

"Bobby"

"Hey Bobby, Lexi Winchester we need to know where her current location is" Dean said

"Lexi? How is my little girl?" Bobby asked

"Dunno she ran away from us when she was 17. We got a call from her mother 16 years after Dad took her in. The mother said she and her husband who is now a state Senator, adopted her when she was five which was a year before we found her" Dean said bringing the older hunter up to date.

"Ok give me an hour or so Dean but I'm not promising anything Dean. Its been awhile since I last caught her trail. Which was a year ago" Bobby said he had been secretly keeping an eye out for Lexi.

Dean thanked him and hung up the phone.

"When I find you Lexi you are gonna wish you had stayed missing" Dean vowed to no one but himself.

"Dean I found her. I know where she is currently living!" Sam said excitedly as Dean reentered the Motel Room.

"Good we will follow up on it in the morning ok" Dean said as he headed over to the bed and was fast asleep before Sam could say anything else.

Little did the Winchester boys know, Lexi was not the person they had once known. She had changed her life style and way of living. At 17 and half after being on the road for a half year, she got herself into some trouble with a crime lord. She had witnessed a murder and had been seen by the Crime Lord's thugs. The murder she had seen was the murder of a Marine. She also had seen his murderer's face. She gave a complete description of the murder's face to NCIS.

She wasn't allowed to be found. In order to protect their young 18 year old witness, NCIS payed for her college education for the full four years.

A year after she had graduated, she had been approached by Special Agent Jethro Gibbs. He offered her a job at NCIS as an Agent.

She gratefully took up his offer and at 22 years of age, she was a junior Agent for NCIS.

Her team didn't know her past and they didn't need to know her past. It was only on a need to know bases type of thing. Not even the NCIS Director know about her past.

It was her secret. According to Gibbs' rules and over hearing Agent DiNozzo saying something about Gibbs rule about secrets, Rule#4 clearly states the best way to keep a secret is to keep it to yourself. Second best? Tell one other person - if you must. There is no third best.

Keeping things secret is the best way for some one you care about hurt, Ducky (Doctor Mallard) had told her multiple times, when he saw her at rare times during her day. She had a feeling Ducky could sense her emotions about something she was hiding from the rest of the team but he never approached her about it.

The second part of this chapter leads into Chapter two which will be posted later this week