We start right where we left with Scott looking at Allison while shifted. Allison looks on horrified about what Scott is. Scott looks over at Chris who honks his horn and yells at Scott to move. Scott jumps over the bus and runs.

"That's a horrible way to find out that your boyfriend's a werewolf." Cora mentions while Allison agrees with her.

Stiles, while on the ground next to Lydia, "No - I'm not just letting you leave her here."

"You don't have a choice, Stiles. You're coming with me."

"Just kill me. Look, I don't care anymore."

Some girls aww while Noah glares at his son for that comment.

Peter lifts Stiles off the ground by holding his claws under his chin, "Call your friend. Tell Jackson where she is. That's all you get."

The hunters have backed off and Allison is slowly getting off the bus. She almost collapses onto the ground, but her dad got her before she fell.

Jackson runs back to the school, "Come on, Lydia. Stay with me. Come on. Help me! Somebody help! Help me! Get help, please!"

While in Stiles' jeep Peter says, "Don't feel bad. If she lives, she'll become a werewolf. She'll be incredibly powerful."

"Yeah, and once a month, she'll go out of her freaking mind and try to tear me apart."

"Well, actually, considering that she's a woman - twice a month." Stiles looks over at him in disbelief.

They all laugh at Stiles' face.

Chris is angry and throws a vase at the fireplace. He is angry at Kate for leaving Allison clues to find out what has been happening. Chris then asks her why she is here. He mentions that she doesn't like it here and he could have found another hunter to help him. Kate claims to be here to help kill the alpha who is randomly killing people. Argent tells her that the kills aren't random, that the sheriff found that all the people killed could be connected to the Hale fire. Kate thinks that is even more reason to tell Allison given that others have always thought that the Argents were responsible for that fire.

The Hales look at Kate suspicious of her behavior.

Victoria is helping Allison pack while Allison is sitting on her bed in shock. Allison wonders what they are going to do to Scott. Victoria mentions that they have a moral code that they follow for werewolves that young. Allison demands to know more, but Victoria says no and gets mad at Allison.

Chris is making Kate take Allison out of Beacon Hills. Kate thinks that he will need her help to find the alpha. He just tells her to go. Victoria asks if Chris can find him, but Chris says no, but that Scott will lead him to the alpha.

Stiles and Peter pull into a parking garage. Peter pulls him to another car, "Whose car is this?"

"It belonged to my nurse."

"What happened to your n - Oh, my God!" Stiles sees the nurse dead in the trunk.

The Hales glare at Peter.

Peter shrugs, "I got better."

Some people snicker at that response even if it was wrong.

Scott is hiding out in the animal clinic remembering the night. Allison is in the car also remembering everything from the night.

"Good luck getting a signal down here. Oh, MiFi. And you're a Mac guy. Does that go for all werewolves, or just a personal preference?"

"Turn it on. Get connected."

"You know, you're really killing the whole werewolf mystique thing here. Look, you still need Scott's username and password, and I'm sorry, but I don't know them."

"You know both of them."

"No, I don't."

"Even if I couldn't hear your heartbeat, I would still be able to tell that you're lying."

"Dude, I swear to God -" Peter slams Stiles head into the laptop.

"Harsh." Laura muttered.

"I can be very persuasive, Stiles. Don't make me persuade you."

Jackson heads into the hospital to see Lydia when the sheriff finds him. The sheriff demands to know what happened, Jackson claims he doesn't know. The sheriff gets very annoyed and shoves Jackson up against the wall. Jackson tells him that he didn't take her to the dance. The sheriff wants to know who did, Jackson says Stiles took her.

"What happens after you find Derek?"

"Don't think, Stiles. Type."

"You're gonna kill people, aren't you?"

"Only the responsible ones."

"Look, if I do this, you have to promise to leave Scott out of it."

"Do you know why wolves hunt in packs? It's because their favorite prey are too large to be brought down by one wolf alone. I need Derek and Scott. I need both of them."

"He's not gonna help you."

"Oh, he will. Because it'll save Allison. And you will, because it will save Scott. Your best friend whom you know so well, you even have his username and password." Stiles types them in, "His username is 'Allison'? His password is also 'Allison'?"

"Still want him in your pack?"

"Hey!" Scott complains while everyone else laughs at that.

Scott climbs to a viewpoint of Beacon Hills after realizing that he could howl and find Derek that way. He howls and hears a responding howl.

"Smart." Talia told Scott who smiled at her.

Stiles looking at the GPS signal, "Wait, what the - That's where they're keeping him? At his own house?"

"Not at it. Under it. I know exactly where that is." Peter looks around hearing Scott's howls, "And I'm not the only one."

"They're keeping me at my own house!" Derek growls.

Allison goes to the hospital to check on Lydia and imagines Lydia covered in blood. She returns to the car and Kate tells her that is what werewolves do and they can't help it.

"Give me your keys."

"Careful. She grinds in second." Peter takes the keys and bends them. "So you're not gonna kill me? Oh God."

Peter: "Don't you understand yet? I'm not the bad guy here."

"You turn into a giant monster with red eyes and fangs, and you're not the bad guy here?"

"I like you, Stiles. Since you've helped me, I'm going to give you something in return. Do you want the bite?"

"What?"

Peter grabs Stiles' wrist, "Do you want the bite? If it doesn't kill you - and it could - you'll become like us."

"Like you."

"Yes, a werewolf. Would you like me to draw you a picture? That first night in the woods, I took Scott because I needed a new pack. It could've easily been you. You'd be every bit as powerful as him. No more standing by his side, watching him become stronger, and quicker, more popular, watching him get the girl. You'd be equals. Maybe more. Yes or no?"

"I don't wanna be like you."

"Do you know what I heard just then? Your heart beating slightly faster over the words "I don't want." You may believe that you're telling me the truth, but you are lying to yourself. Goodbye, Stiles."

Scott looks at Stiles, while Talia looked at Peter with contemplative eyes.

Stiles runs into the hospital to see how she is doing when his dad cuts him off. He yells at Stiles, but Stiles just wants to know if she is going to be okay. Noah says they don't know because she seems to be having a allergic reaction to something and is keeps going into shock. The sheriff asks if Scott knows what is happening which stuns Stiles because he doesn't know where Scott was and thought he was in the hospital.

"I really thought you were at the hospital." Stiles told Scott.

The hunter that is torturing Derek turns on the light and mentions that his knuckles hurt so he has brought a bat. Derek catches the bat mid-swing showing that one if his arms is free. He says he brought some help too and the hunter turns and sees Scott in the doorway. Derek knocks the hunter unconscious.

The Hales were relieved that they didn't have to see Derek actually being tortured. They were happy that the hunter got knocked out.

"Stiles. Listen, just go wait with your friends, all right?"

"Dad, tell me. Look, you know it has something to do with Derek."

"What? But I thought you two said you barely knew him."

"All right, we might know him a little better than that."

"You do realize that I'm elected to this job, right?"

"And if I help you figure this out, you'll be re - elected. Am I right? Dad, come on."

"You know what? That girl in there has got nothing to do with a six - year - old arson case."

"When did you decide it was definitely arson?"

"When we got a key witness. And, no, I'm not telling you who it is, but yeah, yeah, we know it's arson. And it was probably organized by a young woman."

"What young woman?"

"If I knew that, she'd be in jail."

"Was she young then, or is she young now?"

"She's probably in her late 20s. Oh, I gotta grab this call."

"You don't know her name?"

"No, I don't - What is this? 20 questions? All we know is that she had a very distinctive - What do you call it - a pendant."

"What the hell's a pendant?"

"Stiles, do you go to school? A pendant! A pendant! It's a necklace. Now, can I answer the phone?"

"Yes."

"Thank you. Stilinski. Yeah." Stiles realizes who caused the fire.

"You are very good at solving the mystery." Talia complements him. Stiles smiles at her in thanks. Noah smiles at this comment in pride.

Derek is taking off the wires on his stomach with one hand, "Scott, help me with this."

"No."

"What?"

"Not until you tell me how to stop Peter."

"You really wanna talk about this right now?"

"He's going after Allison and her family. He's going to kill them."

"So what?"

"So tell me how to stop him."

"You can't! All right? Now - I don't know when Kate's coming back, so just get me out of this right now! Get me out right now!" Derek yells while shaking his hand in the shackles.

"Promise you'll help me."

"You want me to risk my life for your girlfriend? For your stupid little teenage crush that means absolutely nothing? You're not in love, Scott. You're 16 years old. You're a child."

"Harsh, brother." Laura told Derek who just rolled his eyes.

"Maybe you're right. But I know something you don't. Peter said he didn't know what he was doing when he killed your sister, right? He lied. Remember this?" Scott holds up the report on the deer with the spiral on its side.

Jackson catches up to Stiles, "Hey, where are you going?"

"To find Scott."

"You don't have a car."

"I'm aware of that. Thank you."

"Here, I'll drive. Come on -"

"Look, just because you feel guilty all of a sudden doesn't make it okay, all right? Half of this is still your fault."

"Look, I have a car. You don't. Do you want my help or not?"

"All right. Did you bring the Porsche?"

"Yeah." Jackson holds up his keys and Stiles takes them.

"Good. I'll drive." They start walking when Argent is suddenly in front of them.

"Boys. I was wondering if you can tell me where Scott McCall is."

"Scott McCall? Uhm, haven't seen him since the dance. Jackson, you?"

"I -" Jackson stutters nervously.

"Oh, for the love of God."

"You would practically lie to everyone, but you couldn't lie there?" Lydia complains. "Maybe he was too scared of Argent." Stiles commented.

"Let's try this again. Where is Scott McCall?" Chris asked after locking a room with them inside.

"This is what brought your sister back to beacon hills, right?" Scott asked.

"Where did you get that?"

"My boss told me three months ago someone came into the clinic asking for a copy of this picture. Do you wanna know who it was? Peter's nurse. They brought your sister here so that Peter could kill her and become the Alpha, and that's why you're going to help me. Just say you'll help me, and I'll help you unlock your other -"

Derek is able to break the chain in his own, "I'll help you."

Talia smiled at Derek for doing the right thing.

"Let me ask you a question, Stiles. Have you ever seen a rabid dog?" Argent asks after slamming Stiles into a wall.

"No. I could put it on my to - do - list, if you just let me go."

"Well, I have. And the only thing I've ever been able to compare it to is seeing a friend of mine turn on a full moon. Do you wanna know what happened?"

"Not really. No offense to your storytelling skills."

"He tried to kill me, and I was forced to put a bullet in his head. The whole while that he lay there dying, he was still trying to claw his way toward me, still trying to kill me, like it was the most important thing he could do with his last breath. Can you imagine that?"

"No. And it sounds like you need to be a little bit more select -"

"Always have to be a smart aleck don't you Stiles." Noah muttered to his son. Stiles just grinned at him.

"Did Scott try to kill you on the full moon? Did you have to lock him up?"

"Yeah, I did. I had to handcuff him to a radiator. Why? Would you prefer I locked him in the basement and burned the whole house down around him?"

The Hales smiled at Stiles for bringing that up.

"I hate to dispel a popular rumor, Stiles, but we never did that."

"Oh, right. Derek said you guys had a code. I guess no one ever breaks it."

"Never."

"What if someone does?"

Chris looks at him, "Someone like who?"

"Your sister."

Derek and Scott get out from the dungeon and are in front of Derek's house. Derek is nervous that it shouldn't be this easy. Scott thinks that it should be easy for once. Derek concedes, but is then shot with an arrow. Scott looks over and notices that Allison is the one to shoot the arrow. Allison shoots off a flash bang arrow and it disorients both Scott and Derek. Allison is heading towards Scott who is trying to explain, but Allison isn't listening.

"Harsh." Laura muttered about Allison shooting Derek. The other Hales glared at Allison.

Kate now wants Allison to kill him. Allison turns shocked, thinking that they were just going to catch them. Kate says that they did that and now they are going to kill them. She shows this by shooting Derek. Kate is about to shoot Scott when Chris shows up and stops her. He mentions their code and points his gun at Kate to get her to lower her gun. She is lowering it when the Hale house door creaks open.

The Hales were glaring and growling now that Kate shot Derek. They calmed down a little when the door opened since it meant no more shooting of anyone.

Scott says that it is the alpha. Peter darts around everyone knocking everyone over. He leaves Kate the only one standing. He catches her and throws her into the house, Allison follows and Peter comments on Allison's look. He has his claws at Kate's throat and says that he will give her the chance to save her by saying sorry. Kate apologizes, but Peter considered it insincere and rips her throat out.

Argent and Allison wince for different reasons, Argent because he knows what happens with Kate and Allison because she didn't want to see Kate die again.

Scott and Derek fight Peter. They get him outside when Stiles and Jackson arrive. They had made more molotov cocktails and Stiles threw his at Peter. Peter caught it, but Allison shot an arrow and so Peter got caught on fire. Jackson then throws his and Peter transforms back from his creature to his human form. Allison comes up to Scott and kisses him which makes his werewolf face disappear. She tells him that she loves him. Derek stands over Peter's body ready to slice his throat.

Scott runs up to him, "Wait! You said the cure comes from the one who bit you. Derek. If you do this, I'm dead. Her father, her family - what am I supposed to do?"

"You've - already - decided. I can smell it on you!" Peter states to Derek.

"Wait! No, no! Don't!" Derek cuts Peter's throat out.

"I'm the Alpha now."

The Hales winced at that scene, but they also wondered how good of an alpha Derek would be.

They sneak into Lydia's hospital room, "Shut the door. Oh, God." The door squeaks shut the entire time.

Everyone laughs at that part.

"What?" Stiles asked before Scott started to take off the bandage, "Is it completely healed?" Stiles asked because he can't look.

"No, not at all." Scott answers confused.

"I don't get it. The doctor said she'd be fine."

"Yeah, but the bite's not healing like it did with me. Which means - She's not a werewolf."

"Then what the hell is she?"

Lydia grimaces at the stuff she went through before finding out what she is.

Jackson heads into the Hale house and asks to be turned. We see Derek's eyes glow and he opens his mouth to bite him.

At the Argent's house, Chris is reading a newspaper about Kate being caught with the necklace which means that she burned down the Hale house. Chris points out that they are going to be pariahs in the town now. Victoria asks about Scott and Chris mentions that he is not the one Scott should be worried about now. Up on the roof Scott and Allison are cuddling and looking at the moon.

"So Jackson's a werewolf now and Derek is the Alpha." Cora basically summed up. Jackson looked smug at the fact that he is now a werewolf.

"I'm curious about who Scott has to be worried about now." Talia noted. Scott and Argent grimaced. "You'll see." Scott told them.