Lindsay and Sydney Monroe were born in 1977 in Lewiston, Montana. They were part of the 0.5 of the identical twins; everything in them was the same, same eyes, same hair, same size, and weight, same voice, same DNA, same IQ. But yet, Sydney always had this look, when she was looking at her sister, this expression on her face that was making the only difference between the two of them. As they grew up, Lindsay was a nice and quiet little girl, with good grades and close friends, Sydney on the other hand was more of a loner, even if Lindsay was trying to support her in her life, they never had the complicity that twins are suppose to have.

The love that Lindsay shared with her sister wasn't a two way street, as their parents began to be more interested in Lindsay than in Sydney. She was the one who was allow to go out at night, and the one with the birthday parties, even if they weren't rich, they always put Lindsay's comfort before them, her mother once said that she was her proud. It was a mistake that her mother now regrets everyday.

When they turned 15, Lindsay became the victims of some accidents, she was almost hit by a car four times in a month, she suffered of food poisoning several times, but she always got away. Until that day, in the diner, where Daniel Kaydam shot her best friends. She almost died this day, but still, she survived. After this day, Sydney has changed, her hate for her sister grew, and hurting her became an obsession. Their parents send her to see a shrink, and they found out, that Sydney couldn't stand the fact she had a double, she wanted to be unique, and Lindsay was making that impossible. To protect Lindsay, they send Sydney in a private school in Kansas, but sometimes after that she disappeared. Lindsay hadn't heard from her since.

Lindsay froze when she saw her double coming out the locker room; millions of questions were running through her head. How did she find her? Where was she? What does she want? But only one thing was hurting her the most, why did you does that with Danny. And only one conclusion came to her mind. She was stalking her. She must have seen them in Montana, damn reporters. She must have seen her almost kiss him in that courtroom. And now, she found out where she was, and that was meaning only one thing. She has to move again.

"Lindsay" Danny's voice was like an echo in her head. "Lindsay!"

"Hum?" she finally said.

"You okay? You look like you've seen a ghost"

"I ... I have to go" She said in a hurry as she went out of their office.

Mac was in his car, coming from a crime scene, when his cell phone rang.

"Taylor"

"Mac, it's Lindsay"

"Lindsay, I have some new evidences I'm coming to the lab"

"Mac, she's here, my sister, she is in New York"

"Where are you?"

"I'm at the lab parking garage, I'm going home to pack"

"Lindsay, go back to the lab, now"

"Mac, you don't understand I have to leave"

"Lindsay, go back to the lab you're not safe alone, find Danny, or Stella and stay with them"

"I'll..."

He heard Lindsay's voice like she was far from the phone, he couldn't heard what she was saying.

"Lindsay, what's going on, Lindsay"

"What do you want?" she said to someone else and the phone went off.

"Lindsay!" Mac screamed in his phone "shit"

Sydney was sitting on Lindsay's car, she was different than in the video, she looks like more like... Lindsay, actually she was exactly the same. She smiled

"Hi sis"

"What are you doing here Sydney"

"I came to see how you were, I missed you", she said as she stood and went closer to Lindsay.

"Are you kidding me?" she replied

"I just wanted to make sure you're..."

"You didn't come here to see how I am, you came to see what damage you caused, because you know what you did and you want to make sure you're successful, what you came for is pride, and you're not gonna have that from me. You can't hurt me anymore Sydney, what can you possibly do to me, that you not already done?"

"You know me too well Linds" she came closer to her but Lindsay didn't move "but I have to tell you, that Danny, hmmm, since when are you interesting in that kind of guy?"

"He's just a colleague"

"You know what, I doubt that, a lot actually, because the way he banged me last night..." she closed her eyes and groaned". He sure loves you"

A tear went down on Lindsay cheek and Sydney smiled.

"You know, I didn't see you for a long time now, and I thought it was gone, but no, we still have this connexion, I can feel the pain in you, and it's... overwhelming"

"I won't let you hurt my friends Syd," she said with rage

"I know you won't honey, but what are you gonna do? Kill me?"

"If I have too, I will"

"Oh, that's so sweet, but you're not murderer, are you? I am"

"LINDSAY" Danny's voice came out of nowhere.

Lindsay turned her head to see him running to her, but when she turned again to see Sydney she was gone.

"Lindsay, Mac called me, are you okay, who was she?" he asked taking her in his arms

"She's my sister"

"What does she want?" he asked putting her closer to him

"To finish what she started fifteen years ago"

"What was that?"

"Kill me"

Later this day, Mac had called the entire team. Mac and Lindsay were talking in his office, while; Danny, Hawkes, Stella, and Flack were waiting in the conference room.

"Do you know what's going on?" Flack asked to Danny

"I think" he said quietly "But I hope it's not that"

A moment later, Lindsay and Mac entered the room.

"I called all of you here, because something happens today, and Lindsay thinks that you are in danger"

"How so?" Stella asked first

Lindsay took a deep breath and turn on the plasma screen. A picture of her, taken by the surveillance camera in the parking garage.

"This is Sydney Monroe, as you can see, she's my twin sister"

"Identical twin" Hawkes said

"Yes" she simply replied "we are apparently a few, to be exactly identical, witch means, we have the exact same appearance, the same voice, the same DNA"

"Why do you think we're in danger?" Flack asked

"Because Sydney's only goal in life is to make me suffer. I ran from her for years, and she managed to find me, and she already hurt me"

She looked at Danny a moment; she could see shame in his eyes. But she didn't blame him, he thought Sydney was her, she must be flattered.

"I made some research, in the FBI database, Sydney Monroe, is number thirteen on the most wanted list, she's researched for multiple murder, apparently she's a contract killer, she works in freelance"

"Is there anyway to make the difference between you two?" Stella finally said.

"No" Lindsay said, "she's unpredictable, and dangerous, since you are my closest friends, you're a target to her"

"What do you suggest?" Hawkes asked

"I'm done running from her, she made it very clear that she wanted to end things for all when I saw her, so until I find her, be very careful"

As they all exited the room, Danny took Lindsay's arm.

"Can I speak to you in private, please" he asked

"Yeah, of course"

He closed the door and turned to Lindsay. When he saw her eyes, flashbacks from the night before ran through his head, he shut his eyes closed to try to make the go away. But Lindsay saw that and sighed.

"Danny" she said softly

"I don't know what to say to you, what I've done... I can't regret it more"

"What do you regret? Sleeping with my sister, or sleeping with me?"

"I... you have to admit it's not everyday that you see two people so identical. I thought it was you"

"Don't worry, it's not like it didn't happen to me before, I'll survive"

"Lindsay, it's not what I meant, I don't regret what I thought I was doing, I wanted to do this with you, I thought you were finally ready to be with me"

She sighed

"I don't even know what hurt the most, the fact that she used you to hurt me, or that because of what she did, every time you'll look at me, you'll see her. And as much I as I have feeling for you, I just can't deal with that"

She looked at him one more time, and came closer to him; she looked up into his eyes and brushed her lips lightly on his. The kiss was soft, and brief. When she pulled away.

"I'm sorry," she said before leaving.

Danny went back home and tried to digest everything that happened today, Lindsay's secret, the fact that the most amazing night he had in years was in fact a set up in intend to hurt the woman he loved, and also the revelation from her, that in fact she did have feeling for him, and now he ruined everything. He should have wait, he should have known that Lindsay wasn't the type of girl to hook up in a public place for their first time. Actually, he knows something was strange with her, but how could he possibly know that she had an identical twin, an identical psychopath-murderer twin. He was opening his third bottle of beer, when he heard soft knock on his door. He got up and went to open it, and saw Lindsay, smiling at him. Or maybe it was Sydney

"Hi sexy" she said with a sexy voice

Yeah, it was definitely Sydney.