The man is over Lydia in the bed when Derek arrives and throws him on the ground, ripping his throat.

Stiles: "Are you okay?"

Lydia's scared and confused: "Yes. What are you doing in my room?"

Stiles: "I guess saving you from a killer. Hope you don' t bother. Call this a sleepover."

Lydia: "He… wasn't… wasn't trying to kill me. He…"

Stiles hugs her.

Lydia checks on her parents, then they get out of her house.

There outside…

Lydia: "Why were you here at this hour?" She sees Evan's body. "I didn't want to believe…"

Derek deduces: "You felt it."

Stiles: "He fought some men, and they killed him. He was hiding things from you."

Lydia: "He wasn't hiding anything from me."

Derek's angry: "He told you?!" Getting near her.

Stiles: "Derek, easy, man."

Lydia: "He asked me to keep secret before he told me." They wait. She continues. "He was a collector."

Stiles: "A what?"

Derek: "A collector. In the past, every hunter family had one. They collected information on supernatural creatures."

Stiles: "The bestiaries."

Derek: "Exactly. Didn't think they still existed."

Lydia: "He came to Beacon Hills to protect me. Then we fell in love."

Stiles: "Wait. Protect you from what?"

Lydia: "He didn't say it. He just said somebody was coming. Somebody that wanted me. A banshee. Somebody who has eyes in every place that has a strong supernatural side, just like here. And this person knew Scott defeated powerful entities such as Deucalion. He's after him too."

She kneels near Evan, crying.

Scott and Kira meet in her room where he entered through the window.

Kira attacks him: "So you're sieged in a hospital and nobody calls me!"

Scott holds her: "I asked them not to."

Kira: "I'm glad you're okay, but I'm feeling left out."

"Sorry. Won't happen again."

Stiles and Derek arrive at Derek's loft. Stiles cleans the mountain ashe and they enter.

Derek: "I don't think you should've come here this late."

Stiles: "No, but I needed. You should've told me what was happening."

Derek: "You always want to know everything, but I know you're not as strong as you pretend to be. I expected to solve the situation before telling you. I thought doing what the Argents wanted was the quickest way of getting the antidote."

Stiles: "I don't want you to do these kinds of things in order to help me."

Derek: "I'm sorry I couldn't cure you." Almost crying.

Stiles: "There's still hope. Gerard might have what we want."

Derek walks around: "I don't think we'll see him for a while. He has escaped his family and they probably won't chase him after being destroyed like that."

Lots of silence.

Stiles: "I thought you had left this city for good."

Derek: "I will." They glare. "Stiles, you should go. It's late and I sense my uncle coming."

Stiles leaves, hesitantly.

Cora and Peter enter.

Derek: "Where were you?"

Cora: "He got out to walk, I was watching him."

Peter: "I'm here. Have some trust."

Derek turns, preparing to attack: "You sided with Gerard."

Peter: "Because I wanted something from him. And I have access to the antidote you need."

Derek holds him by the collar: "You'll give it to me."

Peter: "I'm not the enemy. I can help."

Derek: "And what do you want in return? To kill Scott?"

Peter: "I bet you would let me kill him if it were to save Stiles. But no. See, the true alpha state is different than the alpha one. He can be weakened, like he was when Stiles was poisoned, making you weak. He's still weaker than usual since Stiles is poisoned still. More than that, when a true alpha kills someone on his pack, contrary to Kate's belief, he doesn't get stronger. He gets weaker. That's why I don't want the true alpha status. Gerard also thought I wanted it."

Derek: "Why're you telling us all this?"

Peter: "Because I sided Gerard to obtain his knowledge. Because the immortal werewolf is coming to this town. And, alongside a lot of also very funny things, he wants to kill me."

Derek: "Then maybe I'm on his side."

Peter: "You must've seen the killer non-hunter humans. They're professional beast assassins for hire. Lorenzo contracts them to clean the places he'll go, which means kill everyone that knows about werewolves."

Cora: "Lorenzo. It is his name?"

Peter: "Yes. I'll tell you what. I'll give you the antidote and you'll help me get what Lorenzo has and I want. And also, I won't kill the boy that's listening to our chat."

Derek gets Stiles who was right outside of the loft hearing.

Peter: "Looks like I'm so distracting you failed to notice him."

Stiles: "Don't cope with him."

Derek: "We got a deal, uncle."

Stiles arrives at his house and finds Danny waiting.

Stiles: "Danny?"

Danny: "Stiles, I'm sorry, something happened."

Stiles: "Lots of things happened. Feels like Christmas already."

Danny: "Melissa told me to expect you here."

Stiles: "Melissa… you're scaring me."

Danny: "Your dad."

Stiles is frozen scared.

Middle of the night…

Cora enters Derek's room and he grabs her by the neck. He releases.

Derek: "You should not come here unannounced. I could've killed you."

Cora jokes: "What a gentleman. But we both know you're not that badass."

Derek sits on the bed: "What are you doing here?"

She turns on the light: "I'm here to talk. Why are you pushing away the man you love?"

Derek: "He's not a man, he's a kid. He doesn't know what he really wants, yet. Besides, he's in danger because of me."

Cora: "You dated a certain teacher some time ago. She turned out to be a darach, but still…"

Derek: "Jennifer was away of this world, or at least I thought she was. Stiles throws himself in it, it's like he pursues trouble."

Cora: "Ah! You're two are so alike?! I didn't know."

Derek: "I'll wait to see how things go. But the thing is... I don't think he still likes me. I don't see it in his eyes. I think all that happened was too much for him. I almost killed Scott. How's he supposed to let go off that? He shouldn't need to."

Cora: "Yes, things are complicated. His life is surrounded by supernatural forces, it's not like you can change that. So you can at least be with him." Leaves.

Next day…

Scott and Stiles talk in Scott's room.

Scott: "He'll come out of this."

Stiles: "So how are things with Kira?"

Scott: "Don't run away from this."

Stiles: "I can't be talking about my dad in a coma right now." Almost crying.

Scott: "She's cold… a little… I think it was a mistake to keep a kitsune far from trouble."

Stiles: "You tried the same thing with Alison. You should know by now it wouldn't work."

Scott: "And me and Derek tried that with you. I'm sorry."

Stiles: "It's okay. You were under the influence of the-one-that-shouldn't-be-named."

Scott laughs: "Why he's back and you and him…?"

Stiles: "Probably because he's not a human. Maybe the wolf part took over his body. It makes perfect sense. For me at least."

Scott: "Be serious."

Stiles: "He broke up with me, absurd, I know, who would do that? But he did, so he's the one that must come clean to me."

Scott: "You remember who we're talking about here, don't you?"

Stiles: "Totally! And maybe it wasn't meant to be. Just like you're not meant to be single. Talk to Kira. Fix things. Don't Derek yourself."

Derek enters through the window.

Stiles takes a scare: "Jesus! I wonder if people keep waiting for the right moment to do these things."

Peter Hale enters beside him. He gives a vaccine to Derek.

Derek: "This is the cure for you, Stiles. I got it."

Stiles: "I hope this has nothing to do with Peter. I mean, come on! A huge, relentless, bright 'come on'!"

Derek walks forward and quickly injects him.

Scott looks angrily at Peter.

Peter: "So this is your room. Underwhelming."

Stiles faints.

Derek grabs Peter by the collar.

Peter: "Just wait."

Scott's seeing with his wolf eyes and listening his heart.

Derek does the same.

They wait.

Stiles awakes.

Derek hugs him, relieved. He's awkward and lets go.

Stiles: "So I hope it worked. How long I've been in the Forced to Sleep by Vaccine Land?"

Scott: "One hour. Thanks, Derek!"

Stiles: "Yeah, thanks, Derek!" They keep looking at each other.

Peter: "Please, let's stop with the romance, this is so twenties!"

Then…

Stiles: "Derek!"

An arrow trespasses him in the chest.

Peter takes the arrow from him. They all crouch.

Peter: "We must get out of here. These are Lorenzo's men. They're after Stiles."

Derek to his uncle: "Take them while I distract these morons." He jumps the window while Stiles screams 'no!'.

Stiles will go to the window take a look, but is pulled by Peter, and the three of them start to go . They find Melissa.

Melissa with a shotgun: "What are you doing here?" To Peter.

Scott: "Mom, come." Pushing her. She's confused, but goes.

Outside, Derek fights them. He's being defeated, when Ethan appears and helps him. Cora also appears to help. One of the men is hurt by Cora, and they withdraw.

Derek: "We must all go to Deaton. I think we've been silver-poisoned."

Abandoned warehouse…

Melissa: "So I am in danger."

Scott: "Yes, I'm sorry, mom. It's because you know about me."

Melissa hugs him: "Son, don't be sorry. If I could, I'd be in danger all the time instead of you."

Stiles is silent.

Melissa hugs him: "It's okay, they won't hurt you. We're safe here, righ?" to Peter.

Peter: "Yes. But him being down has nothing to do with our safety. It's because Derek is, probably, dead."

Stiles: "Stop. I thought he could be dead before, and he survived."

Peter: "Yes, but you saw the situation. You know what those assassins are capable of."

Stiles remembers Derek and one of them fighting in the hospital hallways.

Melissa: "Oh, Peter, stop torturing the poor kid!"

Scott nears Stiles to comfort him. His phone rings.

Deaton's clinic…

Scott and Stiles enter to find Derek weak with the vet.

Deaton: "He's recovering."

Scott: "Thanks for calling."

Derek: "Cora told you not to call them."

Deaton just looks at him.

Scott: "And where's her?"

Deaton: "She got to your house to investigate."

Stiles gets close to Derek and they hold hands.

Stiles calm: "You're reckless and stupid to do what you did."

Derek: "Look who's talking about reckless."

They almost smile.

Derek gets up and looks around: "Where's Peter?"

Stiles: "Boogeyman was uninvited to our little reunion here."

Derek: "Okay, Deaton, he talked about an immortal werewolf that's coming here."

Deaton steps back.

Stiles: "Deaton?"

Deaton: "I suspected it through the evidences."

Scott: "W-what evidences?"

Deaton gives them photographs of murdered people.

They look at him, confused.

Deaton: "Lorenzo is a sadistic being, he walks with a bunch of criminals that he protects, and, because of this, every city he goes to suffers an increase in violence. He finds it funny. Some of these people were raped before and after the death. I put the pieces together… the ones that were trying to kill everyone who knew about supernatural stuff..."

Derek: "And this begs the question: how are you alive?"

Deaton: "I was hidden. Druid stuff. But there's something else that happened. Something bad."

Stiles: "Of course it's something bad. Why wouldn't it be?"

Deaton: "I had a copy of the bestiary of the Argents. But my sister stole it and vanished, so I can't help you."

Derek: "Guess this means we'll have to trust my uncle."

Stiles: "Trusting who we shouldn't trust, putting ourselves in danger, saving the world. Business as usual."

Derek nears him: "I bet it would be useless to try to convince you to hide."

Stiles: "You're good with bets, then. Didn't know this side of you."

Derek: "Stay near me and Scott, so we can protect you then."

Stiles jokes: "Then how am I supposed to do my thing?" Derek looks angrily at him: "Okay, don't punch me unconscious, okay, I was joking. Why so serious?"

Derek opens his hand that was in fist mode.

Outside, people surround the clinic.

To be continued...