Lydia and Stiles were pacing around the room, waiting to hear from Scott or Derek. Ever since they got disconnected, Lydia had a very bad feeling in her stomach, telling her that something was wrong but she couldn't work out what it was.

"This is bad, really really bad" Stiles voice was very shaky, he didn't know what to think, he didn't know what he would do if he lost his best friend.

Peter watched the pair anxiously pacing around the room "Oh for the love of God! Will you two please shut the hell up and sit down, your making me feel dizzy watching the pair of you walking a around in circles"

Lydia stopped pacing and she stormed towards Peter "Derek is your nephew and your not concerned one bit? He could be dead for all we know and you don't even care!" Lydia was beside herself how Peter was just sitting there with a blank face.

"I did warn him, I told him it was dangerous but he went a head with it anyways"

"Uh" Lydia frowned in annoyance. She knew what Peter said was true, he did warn Derek about it being dangerous but I don't blame Derek for going a head with it, Lydia knew if she was in Derek's place she'd do the same. Erica and Boyd were his friends and if Allison, Scott or Stiles were in trouble she'd do anything in her power to save them, even if she was the weakest of the pact.

As a door closed, Lydia and Stiles stared at the stairway to see who was coming. Derek appeared from nowhere and walked down with an angry look on his face. Stiles looked behind Derek to see if Scott was behind him. As Scott was no where to be seen, Stiles run towards Derek. "Where is he? Where is Scott, Is he okay?"

Derek looked at him blankly "Scott is fine, he's with Allison right now" with that said, Stiles felt like a load of weight came off his shoulders and started to feel relaxed again.

"So did you find them?" Peter questioned, still remaining sitting down.

"We found them yes, but with your friend Allison, they escaped" Derek said looking at Lydia, unimpressed.

Oh no what did Allison do? Lydia thought to herself "Wait Allison was there? What was she doing there?"

Derek shrugged "Ruining my chances of getting Boyd and my sister back that's what"

"Wait your sister? Thought she died in the fire? What about Erica is she okay?"

"Yes my sister, Cora she the youngest of the Hale family and I thought so too but turns out she escaped some how and we found Erica's body in the vault, she never made it" Derek said as he looked down at the ground. He was so frustrated with himself. If it was for him, Erica would be still alive and Boyd would be safe.

Lydia felt Derek blaming himself for Erica's death, but it wasn't his fault "Derek I'm sorry to hear about Erica, there's nothing you can do now, you can't beat yourself up about this, if you wanted to do something useful then find Cora and Boyd and bring them back safe before you lose them too" Lydia had guts, she would say whatever was on her mind and she wasn't afraid to say what was on her mind, however nasty or nice it was.

Derek looked up at her and nodded at her. He took his phone out and phoned Scott "Scott any news?" He asked. "You lost them?"

"Yeah, I kind of had to" Scott said over the phone.

Derek groaned in frustration "That wasn't exactly the plan"

"I know which is why I think we should stick together. Trust me he's too strong, too fast and way too angry for one person to handle, we've got to do this together"

Derek nodded, he had a plan "Look I'm going to the trail by the entrance to the preserve, can you meet me there?"

"Yeah, just got to drop something off first"

"Okay you do that, see you soon" Derek end called and shoved his phone back in his pocket. "Okay I'm going to the trail to meet Scott, I need to find Boyd and Cora before it's too late" Derek looked at them before walking up the stairs.

"Derek wait" Lydia shouted as she chased him up the stairs. "Just be careful" She said looking into his eyes.

"I'm always careful Lydia but I need to go now before they start ripping people apart" Lydia nodded. Derek gave her a reassuring smile before walking out the door.

After a few minutes later Derek left, Lydia decided to go to the store to get food for her and Stiles. As she arrived at the store she got out the car and walked towards the entrance, as she walked she realised she wasn't at the store she was at a swimming pool. She looked around the pool area and noticed something floating in the pool, she slowly made her way toward the pool and saw a body in the water. She covered her mouth, trying not to cry looking behind her to see if there was anyone about to help. As she realised she was alone she walked towards the body "Oh my god, please don't be dead, please don't be dead" she mumbled to herself trying to be brave but deep down she was terrified. She kneeled down at the pool side and pulled the body towards her to find out that it was only a manikin. She sighed in relief and took a few breathes "Are you kidding me?" She looked at her hand and they were mysteriously covered in blood, she gasped as the sight of the blood and turned around to see a dead body sitting on the lifeguards chair. She started screaming and quickly got her phone out of her bag and called Stiles. Stiles got to her as fast as he could. As he arrived her ran out the car and started calling her name.

"Lydia are you okay?" He asked as he ran up to her.

"Yeah I'm okay" she said relieved to see him. "But over there, not okay?" She said nudging her head over to the dead body.

"Yeah I'm going to call my dad" he said taking his phone out of his pocket.

"I already called 911"

Stiles looked at her with disbelief "You called the police before you called me?"

"Am I suppose to call you when I've found a dead body?" She asked as she was confused on as to why she was suppose to call Stiles before the police.

"Yes!" He shouted as he started to dial Scott's number.

"You sure?" Scott said as he looked at Derek and Isaac.

"Yeah, throat ripped out, blood everywhere. It's like the friction shining over here if two twins girls come out of the woods, start asking me to play with them forever and ever, I'm not going to be surprised" Stiles said while pacing around.

"Can you get a little close to make sure it was them?'

"Make sure it was them? Scott who else is going around ripping throats out?" Stiles said, blinking his eyes.

"Please just do it" Scott said, Stiles looked at Lydia before walking towards the body, he noticed that the throat has been slit and he looked closely at the mans hand which he was wearing a ring with the word 'purity'

Derek folded his arms "This doesn't make sense the public pool is all the way on the other side of the woods. We haven't tracked them anywhere near there"

"Derek they killed someone" Scott pointed out.

"How are they moving so fast? They can't be that fast on foot?" Derek said looking at the ground, thinking of ways of how Cora and Boyd are moving as fast.

Scott pointed out as Derek looked at him "They killed someone, some totally innocent kid is dead and it's our fault"

"It's my fault" Derek said correcting him.

"We need help, someone who finds out what they're doing, someone who knows how to hunt werewolves" As Scott persuaded Allison's dad, Chris Argent to help them track down Cora and Boyd. They made a plan to make a trail for Cora and Boyd to draw them into a trap. They thought of the boiler room at the school as it has strong enough doors, no windows or access to the outside and plus the school will be totally empty so no one will get hurt in the process. As Derek, Isaac, Chris and Scott panned out to different locations. As they ran they put these ultrasonic emitters in the ground to corral Cora and Boyd which will help push them into the direction they want them to run. As they were doing that, meanwhile with Lydia and Stiles,

"You didn't have to follow me home" Lydia said as she entered her room.

Stiles said while following her into her room "I just wanted to make sure you got in okay"

"I had a police escort" She pointed out while looking at him blankly.

"I know the inner working of that force, all right? They're not nearly as reliable as people think"

"Well you didn't have to follow me into my room"

Stiles was taken back by her reply which he didn't know what to answer with "Well, I...uh, yeah, I don't have an answer for that, I can leave"

Lydia sighed "Stiles wait, I didn't mean for that to come out the wrong way, I know your trying to protect me and I'm not appreciating that as much as I should, I'm sorry"

Stiles smiled a little "It's okay Lydia, you should get some sleep, you've had an long day"

"Thank you" she smiled as he made his own way out. As she got ready for bed, she couldn't but help think about Derek and how he is in so much danger. She couldn't just go to sleep and pretend everything is fine. She sat on her bed thinking about what she was going to do. She needed to help her friends. She got up and started to re dress herself back into her clothes and grabbed her keys from her desk and headed out the door. As pact got Cora and Boyd locked in the boiler room Derek and Isaac were holding the door trying to no let them escape.

Lydia parked at the front of the school, she followed the ultrasonic emitters that lead to the school. She took a few deep breathes before getting out the car. As she walked into the school it was dead silence. She slowly made her way down the corridor quietly shouting, Scott's and Derek's names. She heard a bang leading towards the boiler room. She decided to go investigate and she went the back way down to the boiler room. She opened the door and peaked her head through before walking in. As she never saw anything she slowly made her way in and closed the door behind her.

As Derek sighed and slid down the wall, in relief that the plan actually worked. Scott heard something and slowly walked towards the door, pressing his ear up against it. Derek looked at him "what do you hear?"

"Heartbeats" Scott said with his ear still against the door.

"Both of them?" Derek asked as he closed his eyes.

"Actually, three of them" Derek looked up at Scott with a worried look. As Lydia slowly made her way through the boiler room, Scott or Derek were still no where to be seen. She immediately stopped when she heard a few growls coming from the corner or the room. She made her way towards the direction where she heard the growls "Hello? Is someone there?" She asked as she started to feel like it was bad idea coming down there.

"Close the door behind me" Derek said asking Scott.

"You go in there alone, and you either gonna kill them or they kill you"

"That's why I'm going alone" Derek said quickly opening the door and closing it behind him.

Lydia heard the growls coming towards her, she slowly backed away as she say a dark figure walking towards her. Cora and Boyd appeared and looked at her and started growling at her, keeping their attention on Lydia. Lydia started shaking and tried to no make an sudden movements or sounds, while keeping her eyes on the werewolves. As the walked up to her, Derek came out of no where a pushed them away to let Lydia run and hide. Derek growled and ran towards Cora and Boyd and started fighting them off.

Isaac looked out the window and saw the sun rising "Scott, the sun is coming up. The sun is coming" Isaac said running down the stairs to see Scott running in boiler room as Isaac followed him in. As Scott and Isaac ran in, they stopped to see Boyd and Cora unconscious on the floor with Derek on his knees looking down at the ground with scratches all over his face and body.

"Lydia is in here somewhere, I need to find her" Derek said taking quick breaths in between. "Get them out of here" Derek demanded as Scott and Isaac looked at each other and helped Cora and Boyd out of the boiler room. Lydia was hiding in between two book shelves with her legs against her chest and her arms folded with her face covered. She looked up as she heard foot steps coming towards her. She peaked around the corner and saw Derek walking towards her. His face and body was scratched to pieces but she knew that he would heel in no time. He looked down at her and offered her a hand. Lydia took deep breathes and took his hand as he helped her onto her feet. Lydia was shaking uncontrollably she smiled a little that Derek was okay. She broke out a few tears and Derek pulled her into a hug where Lydia starting crying while Derek comforted her.