Under a full moon, a basketball game is getting underway inside the Beacon Hills High School Gym.

Young Peter Hale walks into the locker room to find his nephew, 15-year-old nephew, in the midst of wolfing out under a running shower.

Peter chastises him for risking the game during the full moon. Derek says he thought he could control the transformation but Peter says even born werewolves have to learn control on the full moon.

Derek is angry saying it was supposed to be easier for them and wondering why it hurts so much. Peter asks if Derek brought 'it' but the boy says 'it' isn't working. Peter insists and Derek removes a metal disk from his pocket. It bears the triple spiral triskelion symbol. Derek holds it in both hands and chants "Alpha, Beta, Omega" over and over. His transformation continues and he screams in pain.

~~~

At a rainy gas station, a car is parked with its driver's side door open. The attendant hears growling noises coming from the station's only public restroom around the side of the building. He knocks and inside Kate Argent is struggling with a transformation. She calls out to him but then her words devolve into guttural growls again. Thinking she is on drugs, he uses his key to open the door and enter. Kate, full transformed now, attacks him in a frenzy.

It's raining as Scott, Stiles, Lydia and Liz bring the newly regressed and still unconscious Derek to the Animal Clinic. Deaton is baffled by his condition.

"Wow..." Deaton says.

"'Wow?' 'Wow,' as in, 'I've seen this before and I know exactly what to do'-kind of 'wow?' 'Cause that's the kind we were hoping for..." Stiles hopes out loud.

"I think you might be overestimating my abilities" Deaton replies.

"He's cold. Really cold," Liz says while feeling Derek's forehead.

"Do you think this is permanent?" Scott asks

"I'm not sure a medical diagnosis is even adequate. This is well beyond my experience" Deaton explains

"So, what do we do with him?" Stiles asks.

"Until he wakes up? Probably not much. It might be best to leave him with me. He'll be safe here" Deaton proposes.

"You mean, from Kate?"

"If she's alive and she is what you say she is, she won't be able to walk past that gate"

"Why would she want to do this to him?" Lydia asks.

"Knowing Kate, it's probably for a reason that won't be any good for anyone but her" Deaton answers.

"And bad for everyone else," Stiles adds and Liz scoffs.

"Knowing the Argents, you mean" Liz comments.

"You guys should probably go home. He doesn't look to be in any danger... So, maybe the rest of you should get some sleep? It is a school night, and you all need to start taking care of your own lives again" Deaton says and hopes everyone just ignores Liz's comment.

"Someone should stay with you..." Scott says.

"I'll stay. My grades are fine, despite missing a few classes" Lydia explains.

"I'm so not okay with this" Stiles says and Liz rolls her eyes.

"Guys, go"

"No-"

"Text us if anything happens" Scott interrupts his friend and starts dragging him away.

"Nope! Still not okay with it. Not going anywhere. All right, just 'cause you're stronger..." Stiles says and eventually, Scott gets him out of there.

"Why did you say that? About the Argents?" Lydia asks.

"Maybe not all of them but I don't trust hunters in general" Liz replies.

"Why?"

"Because they hide behind a code and pretend that we're the monsters"

"Who?" Lydia asks knowing that there must've been someone she lost at hunter's hands.

"My twin sister, my mom, my dad, my little sister and mulitple people from my pack"

"Your pack? I thought you weren't a werewolf"

"I'm not, but after my whole family I lost control one day at school and one of my friends figured out I was a witch. I then found out she was a werewolf when she was calming me down. Her pack took me in and if it wasn't for her, I would've been dead"

"She sounds like an amazing person"

"She is"

~~~

Scott returns home to find the furniture in the dining area has been removed. A metal bowl is catching drops from a steady leak in the roof and there are signs of minor construction. Scott notices his father is sleeping on the couch and, while watching him, trips over a tool box.

Agent McCall says he's just getting started on the list of repairs "you guys" need done. He asks the time. The clock says 4:05 but Scott lies and says it is midnight. His dad reminds him that they had a deal to have dinner on nights when Mellisa works the night shift. Scott lies again and says he forgot, explaining that after they got back from the "camping trip" he had to go straight to the Animal Clinic to finish up some work.

They make a dinner date for "tomorrow night." His father asks if he got anything to eat, Scott replies "yeah, Mexican."

~~~

At the Animal Clinic, Lydia is dozing. She awakes to find Dr. Deaton checking Derek's heart rate. Liz is still asleep in the corner of the room.

"How's he doing?" Lydia asks

"His heart rate is alarmingly high" Deaton replies. Lydia gets up and feels Derek's forehead.

"He's a lot warmer now"

"Lydia, I'm going to try something. I want you to keep holding his hand, if that's okay" Deaton then checks his healing ability by cutting his arm with a scalpel. It heals much faster than it should.

"That looks like it healed really fast"

"Unusually fast"

"What does it mean?"

"I'm not sure... Let's try something else. Grab me a five-millilitre syringe-- top drawer." While Lydia and Deaton grab the things they need, Liz wakes up and so does Derek.

"Derek...?" Lydia asks immediate.

"Derek, are you all right?" Deaton asks at the same time. Derek looks up and his eyes are glowing blue. Liz makes her way forward and gently grabs his shoulders.

"Are you alright?" She asks and Derek lashes out. Deaton catches her before hitting the ground. "Bad idea" She mutters and uses her witch powers to close the doors. Her eyes glow and Derek growls at her. She looks seriously pissed as she gets up. Then her phone goes off and everyone's concentration breaks. Derek runs off and Liz groans. "Told you, I'm not that good yet"

~~~

Scott and Stiles arrive at school a few hours later and Stiles relates how he often wakes up to find Malia curled up with him in bed. When Scott asks what happens next, Stiles pulls up his shirt and shows him his lower back.

Stiles says after that they just spoon for the rest of the night but expresses frustration that he is always the "little spoon" meaning Malia is behind him in the dominant spoon position. Scott says it just means they're together, they're dating.

Stiles is worried that Malia knows he's not telling her something (that Peter is her father) and Scott agrees that they need to tell her but he doesn't know how. Stiles reminds his friend that Selene also told them they should say it sooner rather than latter and that it was best coming from him, considering she trusts him more than he others.

~~~

Mr Yukimura is teaching about how many great historic leaders have failed spectacularly before succeeding. He lays out the details of one such leader saying he "failed at business, had a nervous breakdown, was defeated for both houses of congress and lost as a candidate for Vice President" and then asks if anyone knows who he is describing. While many hands in the classroom go up, he calls on Malia who seems distracted with a highlighter in her mouth like a dog bone while furiously drawing red lines.

Scott's phone rings – Mr. Yukimura tells him to turn it off. He gives more clues saying "one of our greatest Presidents, Gettysburg Address" Malia still doesn't have the answer. Kira is furiously waving her hand in the air, signalling she knows the answer.

Stiles' phone beeps – Mr. Yukimura again admonishes everyone to turn their phones off.

Malia is furiously looking in her text book when Mr. Yukimura opens the question up to the rest of the class, every hand goes up. Malia sinks down in her desk, embarrassed.

Another cellphone beeps. Mr. Yukimura shouts "I said phones off!" but Kira points out that it's his phone ringing this time.

He picks it up and reads a text "Scott call Lydia."

~~~

Later at the Animal Clinic, Lydia is just finishing putting bandages on Liz's injured side. The vet theorizes that Derek's mind has been regressed along with his body. Lydia says he was scared out of his mind.

They figure out that Derek would try to go home, to Hale House, because he wouldn't remember the fire because from his perspective it wouldn't have happened yet.

~~~

At a construction site, Derek tears through a chain link fence and finds the charred remnants of Hale House reduced to a pile of rubble within a rough outline of the home's stone foundation. He kneels among the remaining boards.

~~~

Scott doesn't want to lie but Stiles and Lydia try to convince him to hold off on telling Derek that his family is dead. Deaton points out that if Derek gets to the house first they won't have to tell him.

~~~

Derek is still kneeling in the ruins when and Deputy Haigh show up. Parrish tells him he can't be there but Derek says it's his house. Haigh is rude, calling Derek dumbass and telling him to "get the hell out of here."

Parrish offers to help. Derek wants to know what happened to his house and his family, his mother. Haigh grabs him, Derek squeezes his arm hard enough to make the bigger man back off. Haigh then grabs his tazer and jabs it into Derek's side and chest.

~~~

Derek is taken to the Sheriff's Station and handcuffed to the same bench where he and Argent were handcuffed at before (see Letharia Vulpina). Parrish offers to remove the cuffs if Derek will be okay.

Haigh says he's run the fingerprints and all that comes up is Derek Hale's criminal record (confusing since he's an adult in the picture). The screen shows Derek's middle name starts with an "S" and lists his height as 6'0" with a weight of 171. His race is listed as "Caucasian/Unknown" the list also includes his address and phone numbers. The sheriff overhears this and steps in. He stares intently at Young Derek for a long time, rising to look again at the adult mugshot and back at the youngster. Stiles, Scott and Liz show up and the Sheriff tells Parrish and Haigh that he will handle this case.

~~~

"I want you to be honest with me--absolutely and completely honest ...Have you been time traveling?" Stilinski asks.

"Hang on, what???" Stiles asks and Liz lets out a little laugh, quickly covering her mouth.

"Because if time travelling is real... You know what? I'm done. I'm out. You're going to be driving me to Eichen House." Stilinski warns.

"We found him like that" Scott explains

"Where, swimming in the fountain of youth?" the sheriff asks.

"No. We found him buried in a tomb of wolfsbane in an Aztec temple in Mexico underneath a church in the middle of a town that was destroyed by an earthquake" Stiles explains.

"You told me you were camping!" the Sheriff says irritated.

"Yeah, we were. In, uh in Mexico" Stiles tries to get outof the situation.

"Derek's been aged backwards-- he can't remember anything. We just need to talk to him" Scott quickly gets back to the important subject before Stilinski murders his own son.

"Yeah, well, so far, he's not talking to anybody" Stilinski tells them.

"He'll talk to us" Liz says.

"Who is she?"

~~~

"Why would I go anywhere with you?" Derek asks.

"There was an accident... You lost some memory, but we can help you get it back" Scott tries to explain.

"How much memory?"

"...A lot. But you can trust us." Scott kneels down in front of Derek and glows his eyes. As they talk, Stiles notices a past due bill notice from Eichen House (1742 Maybrook ST, Beacon Hills, CA 95921) it says "Second Notice" on the envelope.

"You're an Alpha... Okay, who are you? And who is he? Who are you?" Derek asks Scott and Stiles.

"Oh, we're the guys keeping you out of jail!" Stiles replies.

"Let us help you" Scott asks Derek.

"Not until you tell me who you are" Derek refuses and Liz rolls her eyes.

"We don't have time for this nonsense. That is Scott McCall, he's a True Alpha and the reason you're still alive. That's Stiles Stilinski, he's a human and the reason you're not in jail. And my name is Liz Moore, I'm a witch and if you don't let us help ypu, I'll be the reason you're not so alive anymore"

"Did you say you're name's Moore? As in Davina Moore?" Derek asks surprised.

"That's my mom" Liz replies, reluctantly.

"My mom told me about her. Fine, what do you want me to do?"

~~~

Lydia and Kira pull up to the same gas station we saw Kate at last night. Kira is concerned how Scott feels about the whole "dialing up the electricity while he was being tortured" thing and Lydia assures her that Scott "couldn't be more into you." She then tells Kira to grab her Beacon Hills Credit Union credit card from the visor and fill up.

Kira notices that the car's tank is already full and goes to find Lydia. Lydia is around the side of the building staring into the open door of the restroom. She tells Kira not to look but the advice goes unheeded as Kira looks into the blood soaked room.

~~~

Shortly after dark, Scott arrives at Derek's loft on his motorbike. Malia is there, she heard that Scott was going to visit Peter who Lydia calls "Satan in a v-neck" and figures he shouldn't go alone.

~~~

During the car ride Stiles said the Hale house burned down but that his family survived.

"We're going to wait here for Scott. We're going to sit quietly. We're not going to call or talk to anyone." Stiles says as he, Liz and Derek arrive at the McCall house.

"Do I talk to you?" Derek asks.

"No"

"Fine"

"Good"

"Who's going to talk to him?" Liz asks as they enter the house and find Agent McCall with Chinese food.

"AHH! Are you getting taller?" Stiles asks and Liz rolls her eyes.

"What are you guys doing here?" Agent McCall asks.

"We're waiting for Scott" Derek replies.

"Yeah, so am I. We're supposed to have dinner. I brought extra. You guys hungry?" Agent McCall asks.

"Yeah" Derek and Liz say.

"No. We're not hungry" Stiles says glaring at Liz.

"No, I'm starving"Derek objects.

"Yeah, me too" Liz says.

"None of us are hungry. Thanks, though" Stiles says and Liz glares at him now, making him flinch. That girl is terrifing.

"Okay... Well, if you're not hungry, Stiles, your friends can still eat with us" Agent McCall proposes.

"Thanks, I almost forgot that people could be nice" Liz says throwing shade in Stiles' direction.

"What're your names?" Agent McCall asks.

"Miguel! And Isabel. My cousins Miguel and Isabel. From Mexico. So..." Stiles says and for a second it looks like Liz and Derek are both going to kill him.

"¿Sois dos nativos de México? [Spanish: "Are you two native to Mexico?"]" Rafael asks.

"Oh, my God..." Stiles says clearly not expecting that.

"No soy nativo, sino que pasé un montón de tiempo allá. Isabel también[Spanish: "I'm not native, but I spent a lot of time there. Isabel too"]" Derek saves Stiles' ass.

"Fantastic! Egg roll?" Rafael replies.

"Hell yeah!" Both Liz and Derek say. Rafael continues to ask what they want to eat.

~~~

Malia and Scott enter the loft and the werecoyote says she senses something wrong with Scott – his heart is "pounding like crazy" and she wonders if he is nervous. Peter pipes up and says he's just bad at introductions. Scott then awkwardly introduces Peter and Malia. Peter at first seems fascinated asking if Malia got her "beautiful eyes" from her father, she says she got them from her mother and he seems to lose interest.

Peter says they must have told Malia a lot about him – she says the homicidal killing spree came up. Peter says "we're all works in progress" to which Malia responds that when he "progresses" to his next killing spree he should make sure they all stay dead. Scott asks what Peter knows about turning people with a scratch. Peter says the claws would have to go very deep and it's a one in a million chance that it could happen. He suddenly realizes they're talking about Kate.

~~~

"So, uh,... What did you say your last names were again?" Rafael asks and Liz and Derek open their mouths to answer but Stiles is faster.

"Oh, it's Juarez... Cinqua... Tiago..." Stiles answers and Liz and Derek look at him with a look that's confused, annoyed and questioning.

"That's a mouthful. How do you spell that?"

"Phonetically" Derek sees Rafael's badge on the table.

"Mr. McCall, you're an FBI agent?" he asks.

"He's low-level. Very low-level. He doesn't even have a voice..." Stiles tries to save his ass.

"So, do you investigate murders?" Derek asks.

"Sometimes, when it's a federal crime" Rafael replies.

"What about fires?"

"Oh, my God... I wonder where Scott is. Shouldn't Scott be here by now? We should call Scott..." Stiles tries while getting really anxious.

"What kind of fires are you talking about?" Rafael ignores Stiles.

"Do you know anything about the Hale family?" Derek asks.

~~~

Peter is frustrated that nobody stays dead in Beacon Hills. Malia says they all were hoping he would. Scott is trying to work out why Kate regressed Derek to his earlier age. Peter works out that it was to get Derek back to an age where he would trust her, before the fire and before Derek knew that Kate was responsible. He admits that Derek and Kate had a sexual relationship that began shortly after Paige died.

~~~

Derek is pissed and smashes Stiles head into the wall of Scott's bedroom.

"Ah, Liz a little help here?" Stiles states.

"You shouldn't have lied" Liz says, letting herself fall in the chair next to Scott's bed.

"Okay, I didn't lie. I omitted certain truths. Vital truths, now that I think about it" Stiles says and Derek lets go off Stiles' head.

"I don't want to talk to you. I want to talk to the Alpha. I'll talk to Scott" Derek says."Okay, I'm going to go get him. My phone's downstairs. Going to call him real quick. You stay here. Just, don't move, okay? And you, come with me. Don't move. Don't..." Stiles says and drags Liz out of the room.

Kate comes in. She absconds out the window with Derek.

~~~

Trying to get ahead of Kate's next move, Scott calls Lydia to help him figure it out. Lydia explains about the body at the gas station and sends Scott pictures of the murder scene with her new Samsung "Galaxy K Zoom" phone. She mentions in this exchange that she has a 4.0 GPA in AP Biology and that there are parts of the human body on he ground that even she doesn't know.

~~~

Peter says the body looks like she couldn't help it, like she couldn't control her shift and this leads him to believe that Kate wants the metal triskelion.

~~~