Kryptonite

Everyone knew that Kate was his weakness, his kryptonite, and so did 3XK. He had kidnapped Kate and Castle was going crazy, trying to find out where his wife was. He should have gone with her instead of telling her that he was going to sleep in for a bit. He should have just gotten up and gone with her to the crime scene that supposedly Ryan had called her about. It wasn't Ryan that called her, it was 3XK. If he went with her, he would be with her. They wouldn't be safe, but at least he would be with her. They were stronger when they were together. He wasn't with her now though and it was killing him. He just wanted to hold her in his arms, let them both know that it was okay...even though it was far from okay.

They had very little contact with 3XK, but when Castle woke up, he had a video message from him sent from Kate's phone. They were currently running it, trying to see if there was anything that could pinpoint where he was. He was hoping that Ryan could find something, but 3XK was smart. He encrypted the file, so when it was transferred to their computer, it gave it a virus. It took some time to get the virus off their computer and to be able to play the video without any problems. He kept pacing outside of the office or back in forth in the break room. His mother came by, trying to get him to calm down and maybe try to get him to come home, but it didn't work. He was going to stay until they found something.

They finally did find something. They pinpointed his location to a warehouse and rushed over. He got in the back with Ryan and Esposito and prayed silently that they would find Kate there...alive. When they got there, they all seemed to be in sync as they got out of the car. Ryan went first, then Esposito, then Castle, and then a few other officers. Ryan kicked down the door and they turned a few corners. He saw a body in the middle of the floor...laying in a pool of blood.

"Espo, make Castle stand back!"

He quickly pinned Castle to the wall, but Castle fought back. "Ryan, is she in there!?"

He didn't answer him. He just walked into the room and carefully made his way over to the body. He knelt down and moved the hair out of her face, seeing that it wasn't Kate. "It's not her!" With that, Esposito let Castle go. Castle sank to the floor, happy that his wife wasn't dead in the other room, but still terrified because they had no other leads. Ryan inspected the body and saw an address freshly tattooed on her arm. "Espo, come in here!" They searched the address on his phone and saw that it was another abandoned warehouse. Ryan pulled Castle up from the floor and told him they had another address. This time, hopefully it was where Kate was.

They sped over to the address (even though it wasn't that far from where they were) and as soon as they got out of the car, the warehouse blew up.

"Kate!"

Esposito called for the fire department while Ryan went over to Castle, making sure he didn't do anything stupid like run into the burning building...even though he was tempted to run in there himself.

The phone call was a set up. There was a body, but she should have known that when Ryan and Esposito weren't there that something wasn't right. There was a body there though, so she had a job to do. She got out of the car and that's all she remembered. The next thing she knew, she was waking up in a warehouse, tied to a chair. 3XK had her phone and he was saying to her, "Say hi to Castle." Then, everything went black again. She remember that she hoped that wasn't a video asking him to trade himself for her. She knew she was his kryptonite...just like he was hers.

Now, she was awake. She was in the warehouse, just in a different room and not tied up. She was just on the floor. She moved her fingers and her toes. She felt a bit paralyzed in some areas of her body, but she was able to move...even though her body was saying no to that. She got up and inspect her surroundings. She would have tried the door, but she had a feeling that it was either going to be locked or it was going to be a trick. The window was her better option. She went to reach for the window, but her arm was killing her. She was going to have to find something in order to stand on.

She looked around and saw that there was a stool. Hopefully, it was sturdy enough. She picked it up, not wanting to make noise by dragging it across the floor, and moved it to where the window was. Even moving the stool was a task at this point. She tested it with one foot, before putting all her weight on it. Kate looked out the window, trying to see where she was. She saw that it was an empty parking lot and she heard sirens in the distance. Her vision was a little blurry and all she wanted to do was close her eyes, but she knew she had to get out of here.

"Castle..." She hoped that's who the sirens were anyways.

She opened the window and climbed out of it. It was a small window, so it took her a bit to get through it, that and the fact that her body was sore, especially her arm. She figured that's where he injected her with whatever was making her feel the way she was. Kate knew that it wasn't going to be this easy to get away, so she didn't waste time in finding somewhere safe. She hid behind the dumpster that she saw and heard the sirens coming closer. No sooner did she hear the sirens and the car doors open, she heard an explosion coming from behind her. She was too weak to get up and look. Whatever he gave her was starting to knock her out again. She tried to move her toes, but she couldn't this time around. She heard Castle call out her name and tried to speak, but she couldn't say his name loud enough.

"Castle..." She knew if she hit the dumpster, it would make some noise and would alert them. She hoped that they wouldn't just think it was a rat. She lifted her arm up and hit it, but it wasn't loud enough. She was going to be left here and Castle was going to think that she was dead. She saw that there was a can next to her and she thought maybe, just maybe, if she had enough energy to roll the can it would alert them to look over here. She took the can and used all her strength to roll it in the direction she had last heard their voices.

Esposito was the first one that noticed the can rolling to them. He looked in the direction of where the can came from and saw the dumpsters on the side. "Beckett!?" He knew it was a long shot, but crazier things had happened.

Castle looked where Esposito was looking and all three of them ran towards the dumpsters. When they got there, they saw her with her back against the dumpster.

"Kate!" Castle immediately pulled her into his arms, making sure that she was alive.

"Castle...," she whispered.

"It's okay, baby. I've got you. You're going to be okay."

"Can't...fight...much..."

"Shhhh, it's okay. Close your eyes, just not forever."

"Can't...get...rid of me...that..."

"Shhh, I know. I know." He picked her up into his arms and when the ambulance came, he placed her on the stretcher.

Kate couldn't see what 3XK had done to her. It wasn't entirely the medicine that he gave her that was knocking her out and making her weak. She had a busted lip, a black eye, a cut to her forehead, she cut her leg on some broken glass when crawling out of the window (she hadn't realized that she had broken some of the glass when opening the window), and her back was bruised. The paramedics saw and so did Castle. It broke his heart to see her like this, but she was alive. She was here and he wasn't going to leave her side.

AN: This is my iffy chapter. I had the idea, but I felt like my mind just couldn't figure out how to put my ideas into words. So I'm sorry if this chapter isn't the best. See you all on Tuesday for another update! :)