Title: Broken

Author: tmjohn72

Rating: T

A/N - I couldn't get this idea out of my head so I finally settled down and started writing. Please review and let me know what you think. I have plans for multiple chapters though I haven't settled on a number. Thanks for reading!

Derek watched Stiles closely. Word was that Scott was telling everyone to stay away from Stiles and he had to investigate what was happening. He heard Scott approaching him from his flank but he didn't bother turning. His senses told him that Scott was by himself and he wasn't going to give Stiles the chance to escape if this was a diversionary tactic.

"What are you doing here, Derek?"

"I heard that you've been telling people to stay away from your best friend. It seemed like reason enough to investigate, especially with a Kanima on the loose."

Scott walked to his side and saw that he was watching Stiles as he did his homework in his bedroom. They were a few feet into the forest so it was unlikely that anyone would see them where they stood, especially in the perfect darkness that the new moon created.

"I've got this under control. I don't need you butting in and causing problems."

"I'm not here to cause problems, Scott. I'm here to see what has you turning against the person that has been risking his life for you. He didn't make a move on Allison, did he?"

Scott scoffed like it was the most preposterous idea. "Of course not, Derek. Something is up with Stiles."

"Explain." It was more of a command than a request.

"He's been acting strangely these last few days. It's difficult to be specific. It's him...but it isn't."

"Almost like he's been replaced by a shapeshifter?"

"I would know if he were. He smells off and he's become aggressive."

Derek was thinking now. As much as he didn't want to admit it, he had grown fond of the human. He had saved his life on more than one occasion and he wasn't going to turn his back on him, even if Scott insisted he do just that. "Describe his scent to me. Is it like ours?"

"No, he still smells human. But there's something wrong about it, too. Almost like sulphur." Derek broke his eyes away from Stiles and turned to Scott. "Sulphur...are you sure?"

"Yeah. What does it mean?"

They could both hear Derek's heartbeat increase. He turned away from Scott for a minute as he tried to remember all the stories that his father told him and his sister when they were younger. He'd never dealt with it before but he knew that meant nothing when it came to situations like this.

"Damn it, Derek. Tell me what's wrong with Stiles!" There was concern in his voice.

"I don't know this for sure, but it sounds like Stiles may be possessed by something. The scent of sulphur is typically associated with demons." Derek looked like felt pain saying it.

"Demons are real? Like hell and all that?"

"You need to open your mind, Scott. Werewolves and a Kanima aren't the only supernatural creatures walking the planet."

"I figured. I just didn't think about it that much. Is it dangerous?" Derek turned back to the window and his expression changed when Stiles wasn't in his room. He wasn't just concerned for the human teenager anymore. Now he was worried.

"Very dangerous," Stiles said, walking towards them from a position opposite of where he should have been. Instead of coming from the direction of the house he was coming from deeper into the forest. Scott turned to Derek who had his eyes focused on Stiles.

"Stiles, we just want to help you," Scott finally said.

"You don't have to be concerned about me, Scott. Stiles is much better off now that we're sharing his body." The voice had come out of Stiles but, like his scent, it was just a bit off. Scott started to move close to him but Derek grabbed his shoulder and held him back.

"Don't go near him, Scott. He's powerful."

Stiles' eyes moved from Scott to Derek. "You should listen to the Alpha, Scott. He knows what he's talking about. He's heard a lot of stories about creatures like me but he doesn't really know all that much more than you do. Stories can be wrong, after all."

"I can sense that you're dangerous. That's all that I need to know."

Stiles laughed. He walked towards them slowly as a strange feeling traveled up Scott and Derek's spines. It was a sense of something dark and dangerous trapping them and their instincts were on overdrive."I just want to be friends. Why is that so difficult to believe?"

"Leave Stiles. Go take over someone else's life."

"I would, but this host is full of so much potential. You two don't know the half of it, really. I'd rather keep him."

"We're not giving you a choice," Scott said, his eyes glowing yellow.

"Don't Scott, it won't do any good. You'll just be hurting Stiles," Derek warned. Stiles, or rather the demon possessing him, turned his back and Derek was finally able to sense the sulphur smell that Scott had been talking about. It spread rapidly and Derek knew that the possession wasn't going to be easy to kick.

"I'm not leaving Stiles. You two exposed him to this world and all of the wonderful things that stalk the shadows. He's full of energy and I can tell that we're going to do great things together. I'm only going to tell you this once." He turned to face them and a strong force pushed both of them back into trees and held them there.

"Stiles is mine now," he continued," forever and always. I'll let you both live assuming you agree to leave us alone. Beacon Hills is about to experience a few changes and I'm needed here to prepare. If either of you come after me I'll be sure to respond appropriately."

The invisible force vanished as Stiles simply ceased to be in front of them as though he were never there. When they turned he stood watching them from his bedroom window. His hand pulled on the cord to the blinds and then he released the cord causing them to drop rapidly, cutting him off from their enhanced vision.

"We're leaving," Derek said.

"I can't leave Stiles with that thing inside of him."

"If you stay he's going to kill you. We can't do anything for Stiles right now."

"So we just give up? We just say that Stiles is his and go on with our lives?"

"No, we're going to check the bestiary that you have in your possession."

Scott sighed. "You mean the bestiary that Stiles has on his computer?"

"We'll figure it out. You're either coming willingly or I'm going to drag you. I'm not going to leave you here alone to die at the hands of your possessed best friend." Scott relented, following Derek towards the main road where his car was waiting. They got inside after a long silence.

"You need to call Allison and her family. Set up a meeting."

"What?"

"We're going to need help. Two werewolves and a hunter in training won't do any good."

"What about your pack?"

"I sent them on a training mission. They won't be back until Sunday night."

Scott sighed, "It's only Monday. They won't be back for six days."

"That's what I said. I'm driving to the Argents. Are you going to call or are we going to show up unannounced?"