Boyd and Cora were running rampant around beacon hills, as moon crazed werewolves. Their bloodlust was higher then it should be for any sane werewolf. So it was up to the rest of them to stop them.

'You lost them?' Derek said and Jess looked up from where she was looking at tracks on the ground to glance at the alpha.

'Yeah, I kind of had to.' Scott responded over the reciever.

'Derek' Jess warned when she saw the alpha's temper rise and he rolled his eyes at her.

'Wasn't exactly the plan.' He said instead of yelling at him.

'I know, which is why I think that 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.' Scott explained

'Look, we're at the trails by the entrance to the preserve. Can you meet us here?' Derek asked Scott.

'Yeah. Just got to drop something off first.' He said before hanging up.

Derek began calling someone else and Jess stood up what are you doing?'

'Calling Isaac, we need all the help we can get at this point' Derek said looking for his betas number.

'Isaac's still recovering' she protested.

'Well he's all he got right now' Derek said before he began to call him.

Scott, Jess and Derek raced through the woods following the trail. Derek flipped over the side of a tree while Scott jumped over the branch and Jess rolled underneath it. 'Is it them?' Scott questions as Derek scans the bottoming in the mud.

'We're not the only ones that decided to stick together.' Derek told them.

'Brilliant' Jess sighed, sarcastically

'Is that gonna make it easier or harder to catch them?' Scott wondered

'I don't know.' Derek muttered looking around the woods.

'Derek... I saw Boyd try to rip two little kids apart.' Scott said quietly 'Are they gonna do that to everyone they find?'

'Everyone and anyone.' Derek said before he began running again.

'Oh well that's just great' Jess sighs before following after the alpha, her brother beside her. As they ran Jess flashed back to their last moments in the bank.

She was walking with Derek while Scott told Allison what her mom had done. Derek went ahead when Jess stopped feeling her eyes shift slightly. She turned to the side and saw a door.

Walking towards it she opened it only to gasp in horror at what she saw inside 'Derek!' She yelled and the alpha came running back only to stop short when he looked inside.

Erica's body laid there in the corner.

Jess snapped out of it and blinked clearing her eyes from the tears that had welled there. Erica and her never got along that was a definite but that didn't mean she ever wanted to see her dead, especially like that.

The wolves all stopped when they heard the sounds of loud screaming to their left. Glancing at each other they all changed direction and sprinted towards the screams.

They ran up seeing Isaac get thrown into a tree by Cora near a campsite. Scott raced forward and jumped over Isaac kicking Cora back. Scott flipped back up while Isaac, Jess and Derek came out from all sides surrounding Cora. Derek roared at her and Cora looked at him before clothing into the tress.

Isaac, Derek and Scott chased after her while Jess stayed when she spotted a freaked out girl by the campsite. When she stepped closer the girl flinched and moved backwards so she held her hands up showing jess wasn't going to hurt her.

'Are you alright?' Jess asked

'What?' The girl asked, her voice shaky.

'Are you okay?' Jess asked, in a soft voice, She nodded slowly 'you need to get out of here, okay? Get out of the woods. Get out of here as fast as you can.' Jess warned her and when she got a shaky nod in return she bolted after the boys and Cora.

She caught them and Scott was on the phone. Jess raised an eyebrow at the other two and they shrugged

'Are you sure?' Scott questioned

'Yep.' She heard stiles answer 'Throat ripped out, blood everywhere. It's like the frickin' shining over here. Two little twin girls come out of the woods, start asking me to play with them forever and ever, I'm not gonna be surprised.'

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

'Make sure it was them? Scott, who else is going around ripping throats out?' Stiles wondered

'Please just do it.' Scott said before hanging up.

'This doesn't make any sense. The public pool is all the way on the other side of the woods. We haven't tracked them anywhere near there.' Derek said.

'Derek, they killed someone.' Scott argued

'How are they moving so fast?' He wondered

'Derek.'

'But they can't be that fast on foot.' Derek pointed out.

'They killed someone. Some totally innocent kid is dead... And it's our fault.' Scott said sternly

'It's my fault.' Derek corrected.

'We need help.' Scott said

'We have Isaac now.' Derek said looking at his beta beside him.

'I mean real help.' Isaac snapped his head at Scott's words, looking offended 'They're too fast for us, for all of us. They're too strong, too rabid.' Scott went on to explain and Isaac shrugged getting his point.

'We'll catch 'em.' Derek shook his head, not liking what Scott was hinting at.

'What happens if we do? We just gonna hold them down until the sun comes up?' Isaac wondered.

'Maybe it would be easier just to kill 'em.' Derek said

'Killing them isn't the right thing to do.' Scott protested.

'What if it's the only thing to do?' Isaac spoke up 'If we can't even catch them, what else do we do?'

'Find someone who knows what they're doing.' Scott said

'Who?'

'Someone who knows how to hunt werewolves' Scott said and Jess groaned, knowing exactly who he was talking about.

Jess found herself in the backseat of Derek's car, deer and Isaac in front while they watched Scott and Chris talk in front of them. 'Do you think this is gonna work?' Isaac asked

'Nope.'

'Me neither.' Isaac said and Jess rolled her eyes.

'Way to stay optimistic guys' she said and Issac turned around to face her.

'You think this is going to work?' He asked in disbelief.

'Well...no' Jess sighed and he nodded, probing his point before he turned back in his seat.

'So your, uh... your sister...' Isaac began but Derek turned and looked at him with a face reading "don't you dare" 'Sorry, yeah, it's... It's bad timing, I'm sorry.' Isaac said and Derek faced the front. I'll ask later. It's fine.' Derek looked at him again with the same look 'Or never. Yeah, yeah, I'm good with never.' Isaac nodded and Derek nodded with him almost saying "good choice". Jess chuckled in the backseat.

The three watched as Chris began to walk away before Scott spoke up. 'What is he doing?' Jess asked as she watched her brother jump into the ex-hunter's car.

'No idea' Derek said before he drove the car forward after them.

Chris dropped his bag to the floor in front of the four werewolves. Scott had managed to change the hunters mind after showing him the pool sight. 'You're tracking them by print?' He wondered

'Trying to.' Scott nodded

'Well, then, you've been wasting your time. There's only one creature on earth that can visually track footprints, and that's man. And if you're not trained like me, you have no idea that this print is Boyd's and these...'

'are Cora's.' Isaac spoke up when Chris gestured to the footprints to his left.

'Nope. They're yours.' He said and Jess bit her lip to keep herself from chuckling as Isaac looked down to see they were indeed his footprints 'You trampled Cora's as soon as you walked over here. Listen, I know the four of you are focusing half your energy on resisting your own urges under the full moon, but that puts you at a severe disadvantage to Boyd and Cora, who have fully given in. They put the pedal to the floor where you four are barely hitting the speed limit.' He explained looking at each wolf in turn.

'So what do we do?' Derek asks

'Focus on your sense of smell. Actual wolves are known to track their prey by up to a hundred Miles a day by scent. A trained hunter can use scent to track them. If the wind is with them, wolves can track a scent by a distance of two Miles, which means we can draw them to us... Or into a trap.' He said tossing a net at Scott who just managed to catch it 'Full moon does give us one advantage. They'll have a higher heat signature, which makes them easier to spot with infrared.' He said tossing Isaac, Jess and Derek binoculars.

'Thanks, but I've got my own.' Derek said flashing his alpha eyes.

'Just remember, we're not hunting wild animals. Underneath those impulses are two intelligent human beings. Don't think they can't rely on that human side. It's suppressed, but it's there, reminding them how to mask their scent, how to cover their tracks, how to survive.' He told them before the five of them walked up the hill, the lights of the town shining below them 'When's the last time you saw your sister?' Chris questioned Derek

'Nine years. I thought she died in the fire.' Derek said

'Do you feel like you have a lock on her scent?' Derek shook his head 'Scott, how confident are you in your skills?'

'Honestly, most of the time, I'm trying not to think about all the things I can smell.' Scott said and Jess couldn't help but nod agreement, some smells were okay others ... Not so much.

'All right. The problem is when they breach the woods and hit the residential area. Once they're past the high school, they're right in the middle of beacon hills.'

'They're not gonna kill everything they see, are they?' Isaac asked.

'No. But there is an important difference to recognize. Wolves hunt for food. At a certain point, they get full. But Boyd and Cora are hunting for the pleasure of the kill, for some primal apex predatory satisfaction that comes from the ripping of warm bodies to bloody shreds. And who knows when that need gets satiated?' Chris shrugged.

'We can't kill them.' Scott argues

'What if we can't catch 'em?' Derek points it out

'Then maybe we just need to contain them. There's no one in the school at night, is there?' Chris asked, with a thoughtful look on his face.

'You want to trap them inside?'

'If there's somewhere with a strong enough door, no windows or access to the outside.' He nods

'The boiler room' Jess suggests 'It's just one big steel door.' She shurgs

'You're sure the school's empty?' Chris asks and Scott nods.

'It has to be. There can't be anyone there this late, right?' He said, sounding confident.

'These are ultrasonic emitters., he says grabbing an emitter from a suitcase 'It's one of the tools we use to corral werewolves, pushing them into a direction we want them to run.' All the werewolves wince as Chris presses the button and clasp their hands over their ears'

'Gives off a high-pitched frequency that only they can hear.'

'God, no kidding!' Isaac shouts 'Turn it off, turn it off' he says and Chris does and they all relax when they no longer hear the high pitched sound.

'These are gonna drive them to the school?' Derek asks as Chris hands him two emitters.

'And then it's up to you to get them into the basement.' He tells them handing Jess two emitters.

'Does anyone else want to rethink the plan where we just, uh, kill 'em?' Isaac asks and Scott glares at him.

'It's going to work.' He says taking the emitter. Derek looks at him doubtfully 'it'll work.'

'Let's hope so' Jess sighs, spinning the emitter in her hand before sprinting away as they split up.

Jess runs through the woods and hits a tree branch she flips over it, jamming an emitter into the wood as she passes. Landing on the forest floor she can already hear the sound as the emitter turns on and she runs forward to drop the other one further ahead before she bolts towards the school to meet up with the others.

Jess ran in flipping over one of the school fences and landing near Isaac 'hey' she greets casually.

'What took you so long?' He questioned and she glared.

'Oh I'm sorry if we're not all as fast as you are but in case you didn't notice I got the long route' she points out.

Isaac goes to say something else but is cut off when the two wolves hear a loud howl from not too far away and in a couple of second they both heard loud breathing from behind them.

'Oh, great.' Isaac sighs sarcastically as the two turn finding both Cora and Boyd standing behind them growling. Their eyes shine but before a fight starts headlights sine on them following a long car horn. The two wolves bolt leaving Isaac and Jess standing there following their movements.

They went for the doors but the minute they saw Derek inside they jumped up and began climbing.

'They're going over it' Jess whispered before she ran towards where the others were joining up.

'The red doors, someone has to get them open.' Chris said as they all gathered around in front of the school. Derek nods and goes toy he doors

'Someone has to drive them inside.' Scott points out

'I'll go.' Chris said bring out an electric baton

'No. I'm faster.' Isaac argues and bolts off.

Derek slammed Cora to the side inside the school and Boyd immediately stopped and growled at him. Chris appeared with his electric wand and both Jess and Scott appeared from the stairs.

'Come and get us.' Derek muttered before the three wolves bolted, Boyd and Cora running after them. The three ran down and opened the door to boiler room the other right behind them. Jess stayed by the door and Scott and Derek ran in and she hid when Boyd and Cora went in as well.

As soon as the crazed werewolves were gone, show waited for her brother and Derek. She heard loud growling and hurried footsteps. She slipped out as Scott and Derek raced forward. Derek slammed the steel door closed and turned the heel locking them inside.

The wolves banged on the door from the inside before stopping, 'Did that actually just work?' Scott gasped in disbelief.

'It worked.' Derek nodded and the three werewolves shared a sigh of relief leaning against the wall opposite the door. Both Derek and Jess slid to the floor but Scott moved closer, the side of his head pressed to the door. 'What are you hearing?' Derek questioned

'Heartbeats.' Scott told them.

'Both of 'em?' Jess guessed, pulling her out of the messy ponytail she had out it in.

'Actually... Three of them.' Scott said and they looked up in alarm and confusion.

Derek suddenly moved forward after the realisation that someone else was in there with two bloodthirsty werewolves. 'What are you doing?' Scott questioned the alpha as he went to the door.

'Close the door behind me and keep it shut.' Derek ordered.

'Are you crazy? they'll rip you apart' Jess hissed in alarm.

'That's why I'm going in alone.' Derek said looking back at them before he opened the door and raced inside. Scott closed it behind him.

'They're gonna kill him aren't they?' Jess whispered and Scott remained quiet 'Derek won't kill his sister and he won't hurt Boyd cause he's his beta so that means...' She trailed off as they heard loud growling and the door in front of them rattled as fighting issued inside.

'Scott! The sun's coming up!' The twins heard Isaac shout but they hearing was plainly focused on Derek's heartbeat that was speeding up but also growing fainter at the same time.

Scott and Jess looked at each other before they opened the door racing inside just as Isaac opened the door up the stairs. The three ran into the boiler room, flinging Derek kneeling on the floor bloodied and clawed all over. Boyd and Cora lay at his feet but Jess could still hear the heartbeats and knew they weren't dead.

'There's a teacher.m Derek gasped out 'I'll take care of her. Get them out of here.' He ordered and they nodded Isaac and Scott going to Boyd while Jess went to Cora. Lifting them out of the boiler room they took the two passed out wolves away from the school.

Later that morning Jess and Scott found themselves besides stiles in the morgue looking down at heather's dead body, the guy from the pool next to her on another table. Stiles covered it up 'So Boyd and Cora might not have killed anyone?' Scott guesses.

'You're gonna wish they did.' Stiles sighs

'Why?'

'I'm not exactly sure yet. the other girl who was out in the woods, Emily? Eventually they're gonna find her. She's one of them. Emily, Heather... That guy Lydia found at the pool. All three were virgins... And they're all gonna have the same three injuries... strangled, throat slashed, head bashed in. It's called the threefold death.' Stiles explained

'So if these aren't random killings, then what are they?' Scott asked

'Sacrifices. Human sacrifices.'