Stiles makes a panicked late-night phone call to Scott after he finds himself in a strange location with his leg in a steel trap. Lydia leads them to the mental health center where Barrow was committed, however Stiles is not there. Scott's mother and father find Stiles, who had been sleepwalking. Derek and Kira find Stiles's baseball bat at the power station, and Derek deduces that Kira was indirectly responsible for the Nogitsune taking over Stiles's body. Stiles has an MRI scan to test for frontotemporal dementia , the same illness that caused his mother's death. The power then goes out, due to the Nogitsune having damaged the wiring on the roof the previous night. The Nogitsune, now in complete control of Stiles's body, confronts the remaining Oni, who are revealed to be led by Kira's mother. A charged high voltage cable falls out from the hospital roof on top of Kira.
NARRATOR: Previously on Teen Wolf When a kitsune rubs its tails together it can create fire or lightning. It's called foxfire. All day I have been hearing this sound. (WHISPERING) You've been right every time something like this has happened. So don't start doubting yourself now. Are you all right? STILES: I guess not really. ALLISON: They're called the oni. They're looking for someone possessed. A dark spirit attached to them. (PHONE VIBRATING) Scott: Hey, man, what's up? Stiles? (STILES BREATHING NERVOUSLY) Scott: Stiles? You there? STILES: (WHISPERING) Scott? Hey, I'm here. Scott: Are you okay? Can you hear me? Stiles: Scott, I don't I don't know where I am. I don't know how I got here. I think was sleepwalking. Scott: Okay, um, can you see anything? Just tell me what you see. Stiles: Ah, it's dark. It's hard to see. I think there's something wrong with my (DISCONNECTS) STILES: (VOICE MAIL) Hey Stiles? This is Stiles and you missed me. Leave a message (EXHALES DEEPLY) Scott: Come on. STILES: (VOICE MAIL) Hey, this is St (BREATHING HEAVILY) Scott: God, come on. Come on. Scott: Stiles? STILES: Scott, I don't think I can get out of here. I can't move. Scott: Where are you? Stiles: I don't know. I don't know, It's too dark. I can't see much and something's wrong with my leg. It's stuck on something. And it's.. I think it's bleeding. Scott: How bad? Stiles, how bad is it? Stiles, are you there? Can you hear me? Stiles: Ah, there's some kind of smell down here. Something smells terrible. It's brutal. My eyes are watering. Scott: Okay, listen. I'm calling your dad. Stiles: No, no, no, no, don't. Scott: But your dad Stiles: Don't. Just please don't call him. Promise you won't. He already worries about me too much. Scott, please. Scott: But what if I can't find you? Stiles, I can't make a promise like that. Stiles: No, no, no, just please. (SNIFFLING) Stiles: Please, don't call him. Come find me. You can do it. He doesn't have to know. Scott, you can find me. Scott: I don't know if I can do this. (SNIFFLING) Stiles: Oh, I gotta call you back. I have to turn the phone off. Scott: What? No, hey, wait Stiles: I'm gonna call you back. Scott: Hold on, Stiles wait Hold on, man. (PANTING) (YELLING) Scott: Isaac! Isaac, get up! I need your help! Isaac! Isaac: Why? What's wrong? Scott: It's Stiles. Get dressed. Isaac: What's wrong with Stiles? Scott: I don't know. (JAZZY MUSIC PLAYING) Lydia: I said hold still. Are we even allowed to be here this late? What if security catches us? Lydia: There is no security. The number of homicides in this school has seen to it that no sane person will ever take a night job here again. So we're all alone? Lydia: You're losing the pose again. You know, when you said you wanted me to model for you, this wasn't what I thought you had in mind. Lydia: Oh, really? If you're thinking nude modeling, it's usually done without the pants. (PANT UNZIPPING) (MUSIC CONTINUES PLAYING) (SOUND OF VOICES SPEAKING INDISTINCTLY) Lydia: You hear that? Hear what? Lydia: You don't hear that? I hear music. What do you hear? Lydia: Voices. (STATIC BLARING) LYDIA: It's gone. STILES: Please, come find me. (PHONE VIBRATES) Scott: Hey, Stiles. STILES: Did you call him? Did you call my dad? Scott: No. Just Isaac. We're coming to find you. Can you figure out where you are? Try to find something and tell us where to look. STILES: It's a basement. I think I think I'm in some kind of basement. Scott: In a house? Stiles: No. It looks bigger. Like industrial. I think there's a furnace. But it's cold. It's freezing down here. I gotta turn the I gotta turn the phone off. It's going to die. Scott: Wait, wait, wait. What else is there? What do you see? Stiles: The phone's dying. I can't talk. (WHISPERING) I have to go. Scott: Please Stiles, why are you whispering? Stiles:(WHISPERING) Because I think there's someone in here with me. (UPBEAT MUSIC PLAYING) Kira: Mom, my lamp's dead. Do we have any more bulbs? Mom! (ELECTRICITY CRACKLING) (GLASS SHATTERING) What did you do? Kira: Uh, nothing. It was an accident. NOSHIKO: It's after midnight. You should be asleep. (ELECTRICITY CRACKLING) Go to sleep. How did you know? Did he call you too? Lydia: I heard it. AIDEN: Don't ask. It gets more confusing when you ask. (WHISPERS) Okay. Lydia: Not as confusing as this. He uses red for unsolved cases. Maybe he thinks he's part of an unsolved case? Or is an unsolved case. Lydia: Hold on. Is he still out there? You don't know where he is? Scott: He said he was in an industrial basement somewhere. We came here to get a better scent. What else did he say? Something's wrong with his leg. It's bleeding. And he's freezing. AIDEN: Tonight's the coldest night of the year. It's going to drop into the 20s. Lydia: What did his dad say? We kind of We didn't tell him yet. Lydia: Stiles is bleeding and freezing and you didn't call his dad? Scott: He made me promise not to. We can find him by scent. If he was sleepwalking he couldn't have gotten far, right? Lydia: You didn't notice his Jeep is gone, did you? You promised you wouldn't call his dad. I didn't. Scott: Wait, Lydia, hold on. I can get more help. I can call Derek, Allison Everyone except for the cops. Great idea. You guys remember she gets these feelings when someone's about to die, right? Scott: You don't have to call his dad. It's five minutes to the station. Lydia: We'll catch up. What? Why? Lydia: There's something here. Yeah. Evidence of total insanity. We can figure out what's wrong with him after we find a way to keep him from freezing to death. LYDIA: Go. We'll be right behind you. (PANTING) (SCREAMING) (SOBBING) (SCRAPING) (SNIFFLING) Stiles: Who's there? I know you're there. I can hear you. (SNIFFLING) (SCRAPING CONTINUES) (SNIFFLING) (PANTING) Stiles: Who are you? (EXHALES DEEPLY) (PANTING) Self. (PANTING CONTINUOUSLY) (WIND BLOWING) (STILINSKI BREATHES) Come on. If his Jeep is gone, that's where we start. Parrish, let's get an APB out on a blue 1980 CJ-5 Jeep. Cordova, I want a list of any kind of industrial basement or sub-level of any building that he could've gotten into while sleepwalking. It's the coldest night of the year so far. So If he's out their barefoot in just a T-shirt, he could already be hypothermic. Let's move fast. Let's think fast. The two of you, come with me. Okay. Is there anything you need to tell me that I can't tell anyone out there? Lydia knew he was missing. Can she help find him? Well, she's working on it. Anything else? SCOTT: I called Derek and Allison for help. Can you find him by scent? (KNOCK ON DOOR) We got it, sir. We found the Jeep. (SIRENS WAILING) It's dead. He must have left the lights on. Why would he come here? Let's find out. Security's doing sweeps of every floor. Nothing yet. What about the basement? Follow me. Derek: He's not here. Not anymore. Scott: You mean the whole building? Derek: Gone. I'll go tell Stilinski. And see if you can find Allison. She's not answering her phone. Derek: Notice how strong the scent is up here? Ever hear of chemo signals? Chemical signals that communicate emotion. And just our sweat can give off anger, fear or disgust. Take a deep breath and tell me what you feel. Scott: Stress. Derek: And anxiety. Scott: What was he doing up here? Derek: I don't know. But there was definitely some kind of struggle. Scott: With who? Derek: Himself. Where is everyone? We get a lead on our sword-wielding maniac? Nope. But we've got posters up all over town for your guy. Not exactly how I described him to the sketch artist. Well, you're not exactly the highest priority of the tonight, Agent McCall. What does that mean? What's the high priority? Didn't you draw this? Lydia: Put that back. It's yours right? Lydia: It's one of them. I guess. He likes you a lot, doesn't he? Lydia: Maybe he likes the drawing a lot. "For Lydia." Okay. (PHONE BEEPS) (TEXT MESSAGE) "Nothing at hospital Derek headed to high school."Isaac going to find Allison." And Scott's with the Sheriff. And we're standing in a bedroom staring at the walls. (BEEPING SOUND) (VOICES WHISPERING) Lydia: What did you just do? Did you touch one of the strings? Maybe. (PINGING SOUND) (VOICES WHISPERING) Lydia: What did that sound like to you? Like a string being pulled. Lydia: You didn't hear people whispering? I definitely did not hear people whispering. (VOICES WHISPERING LOUDLY) Lydia: You didn't hear that? Lydia, I'm not sure anyone hears what you hear. Lydia: They're whispering. Something about a house. What house? (VOICES WHISPERING LOUDLY) Lydia: That one. What's Eichen House? Lydia: A mental health center. It's where William Barrow, the shrapnel bomber, was committed. Is that it? Lydia: That's where he is. That's where Stiles is. [SCENE_BREAK] No, come on. (SNIFFLING) (PANTING) (SCREAMING) (BREATHING HEAVILY) Stiles: Who's there? Who are you? (SPEAKING JAPANESE) Stiles: What? (SPEAKING JAPANESE) Stiles: I don't I don't understand. Not who are you, Stiles. Who are we? (GROANS) It's getting colder, Stiles. Did you notice that we've stopped shivering? Do you know why that's a bad sign? Stiles: It's the body trying to conserve energy. It was my fifth grade science report. Hypothermia. Our speech is starting to thicken. Then comes fatigue. Confusion. We're going to die if we don't get out of here. Stiles: Stop saying that. Stop saying we. We're just trying to keep you from freezing to death. You better get up, Stiles. Stiles: How? There's a freaking steel-jawed trap on my leg! Is there? (SOBBING) Notice something different? It was on your right leg before, wasn't it? Stiles: No Are you sure? What is this? What are you doing? We're trying to save you, Stiles. We're trying to save your life. STILINSKI: Lydia, I don't want to say "Are you sure about this" but No, he's here. Lydia: I swear to God he's here. I need access to all basement rooms in this facility. Hey, is this the exact transcript of Scott and Stiles's phone call? It's what he gave us. But these words. Stiles says, "Something smells terrible. My eyes are watering." MELISSA: Hi, I'm Melissa McCall. I was hoping to see Agent McCall. What are you doing here? My shift was over. I just wanted to see if I could help. It's here. It's right here. LYDIA: Stiles? Lydia? Lydia: I don't get it. This has to be it. Then where is he, huh? Where is he? Where is he? I'm sorry. Lydia: I don't understand. (ENGINE REVVING) MELISSA: So what are you saying? I'm saying the real question might be, how do we know he's not still asleep? You mean he's been asleep the whole time? Well, people who sleepwalk can do crazy things. One guy goes down to the kitchen and cooks an entire meal. Another guy is found mowing his lawn naked. Why's any of that matter? Remember that townhouse apartment we lived in? There was that one night I came home drunk Oh, one night? Let me finish. So I'm drunk, passed out on the bed. I get up to go to the bathroom. Then all of a sudden I hear you yelling "What the hell are you doing?" Because you were in the closet peeing into the laundry basket. Yeah, I thought it was the bathroom. Oh, no, you were drunk off your ass. Yeah, But I was convinced it was the bathroom. Yeah. So how do we know isn't just convinced he's in some kind of basement? And isn't actually there. I think when he called Scott, he was still asleep. And is still asleep right now. Then where is he? I got an idea about that too. You don't understand, do you? It's a riddle. Do you know any riddles, Stiles? Stiles: A few. What gets bigger the more you take away? A hole. What gets wetter the more it dries? A towel. (SNIFFLING) When is a door not a door? When it's ajar. Everyone has it, but no one can lose it. What is it? Stiles: I don't (EXHALES DEEPLY) (SHIVERING) Everyone has it, but no one can lose it. What is it, Stiles? Stiles: I don't I don't know. Everyone has it, but no one can lose it. (SPEAKING JAPANESE) (GROANING) Stiles: I don't know. (SPEAKING JAPANESE) (GROANING) (PANTING) (GRUNTING) Stiles: No! No! No! No! (GROANS) Stiles: No, wait! (SCREAMING) Stiles: Wait! (SCREAMING) Stiles: Wait! (YELLING) Stiles. (SCREAMING) Stiles: Wait! No, Wait! Stiles! Stiles: Wait! Stiles, you're all right! Okay! You're all right. Stiles, you're all right. (BREATHING HEAVILY) (BANGING ON DOOR) What the hell have you been doing? Allison: Sleeping. What the hell are you doing? You didn't get any calls or texts? Allison: My phone's off. I never turn my phone off. (PHONE PINGS AND CHIMES) Sleepwalking? Is he okay? Yeah, they found him a few minutes ago. They're bringing him to the hospital. I don't know what happened. I never turn it off. (STATIC BLARING) Who's that? (MAN SPEAKING JAPANESE) So, you think he was just sleepwalking? Or is there something more to it? Derek: In this town there's always something more. What if I told you I know something more? I kind of overheard Well, I listened in on Stiles talking to Scott. How he thinks he was the one who wrote that message in the Chemistry room. The message telling Barrow to kill Kira. Derek: You think Stiles, skinny, defenseless, Stiles is the Nogitsune? A powerful, dark spirit? I'm not the only one thinking it. I'm just the only one saying it. Derek: This thing wants to possess someone and chooses Stiles? Why wouldn't it take someone bigger, stronger? Someone with a little more Power. (SIGHS) He's sleeping now. And he's just fine. He doesn't remember much. It's a bit like a dream to him. Thank you. It was that repellent we sprayed in the coyote den to keep other animals out. I couldn't go near it without my eyes watering. It's just a good thing he mentioned it over the phone. No, it was more than that. Thank you. It was a lucky connection. McCall, can you shut up please and accept my sincerest gratitude. Accepted. All right, you two. You've got school in less than six hours. Go home. Go to sleep. Okay. (INDISTINCT CHATTERING) Lydia: I don't know what happened. I was so sure. Yeah, I wasn't much help either. Doesn't matter, if he's okay. (METAL CLANKING FAST) Lydia, Do you hear something? Lydia: No. (CLANKING STOPS) Lydia: I didn't hear anything. (LOCKER CLOSES) (PHONE CHIMES) (SOFT MUSIC PLAYING) Kira: Scott. Hey DEREK: He's a little preoccupied. But I can help you. Kira: Why would you want to help me? Derek: Because I want you to tell me everything that happened at the power station with William Barrow. Actually, I want you to show me. It was the other day. I asked him some questions. Just symptoms and, um MAN: (OVER PA) Blue team to ICU please. Blue team, ICU. Yeah. It's okay. I think I, uh I think I know what you're talking about. I've been writing these down for the past two weeks. I think we need to do some tests. It was around here, I think. But everything kind of looks the same now. KIRA: What is that? Is that a baseball bat? Derek: It's Stiles's bat. It's magnetized. Kira, I'm going to need you to tell me everything you know about foxfire. (MAN SPEAKING JAPANESE) (BEEPING) You're right. It's Japanese. Who left this on your phone? I don't know. All of the messages are the same and they all say Blocked ID. Can you translate it? Mostly. The man speaking is giving instructions actually. The first line is, "All evacuees are required to stay "at least 10 feet back from outside fences." What does that mean? What fences? The fences surrounding a Japanese internment camp during World War II. After Pearl Harbor, Japanese-Americans were rounded up and put in camps. This man is reading instructions to prisoners upon their arrival. (SPEAKING STOPS) Well, where does something like this come from? I have no idea. Because it's fake. It mentions the name of the internment camp as "Oak Creek." There was no internment camp named Oak Creek in California. Scott: You okay? Lydia: Yeah. I'm just a little hyper-sensitive to loud sounds today. (LOCKER CLOSING) Scott: They're doing tests on Stiles all afternoon. I was going to go over at around 6:00 to visit. You want to come with me? Lydia: I should probably just go home. (LOCKER CLOSES) Scott: You sure you're okay? Lydia: Yeah. I'll text you later. (THUDS) I'm not sure I know how to pronounce this. Or if it's not actually a misspelling. Just call him Stiles. Okay. Stiles, just to warn you, you're going to hear a lot of noise during the MRI. It's due to pulses of electricity going through metal coils inside the machine. Uh, if you want we can get you earplugs or headphones. Stiles: Oh, no, no, I don't need anything. Hey, we're just on the other side of that window. Okay? Stiles: Okay. You know what they're looking for, right? It's called frontotemporal dementia. Areas of your brain start to shrink. It's what my mother had. It's the only form of dementia that can hit teenagers. And there's no cure. Scott: Stiles, if you have it, we'll do something. I'll do something. Kira: I don't know if I should go in. You're going to tell Scott that Barrow might have used foxfire created by me to jump start the Nogitsune's power inside Stiles. Derek: Yeah. Kira: Basically that I helped a dark spirit take control of his best friend. Derek: You should probably wait here. DOCTOR: Okay, Stiles. This will take about 45 minutes to an hour. Now remember, try not to move. Even just a little bit. Stiles, you're going to hear that noise now. It's going to be a loud clanging. Kind of like a hammer hitting an anvil. (METAL CLANKING) (METAL CLANKING CONTINUOUSLY) (LYDIA IS SITTING IN HER CAR AND IS HEARING THE SAME SOUND THAT STILES HEARS) (UPBEAT MUSIC PLAYING) (METAL CLANKING CONTINUES) Scott: You know the stuff you we're telling me about chemo signals earlier? It reminded me of the time you we're teaching me to use anger to control the shift. Derek: I think you ended up teaching me more about that. Scott: Are you teaching me again? Derek: Think of it more like sharing a few trade secrets. You know, I took Cora back to South America, right? It's where she spent most of her time after the fire. But that's not the only reason I left. I needed to talk to my mother. Scott: Your dead mother? Derek: She told me something that changed my perspective on a lot of things. She said that my family didn't just live in Beacon Hills. They protected it. This town needs someone to protect it. Someone like you. Scott: And someone like you to teach me a few trade secrets. Derek: What? He was trying to protect us. Stiles was protecting us. From himself. Derek: What are we looking for? Scott: I'm not sure. But I think Stiles wasn't just up here struggling with himself. I think he was struggling not to do something. (METAL CLANKING) (INAUDIBLE) DOCTOR: See this? The tissue here and there. Both those spots are showing signs of atrophy. Atrophy. DOCTOR: I'm sorry. (MELANCHOLY MUSIC PLAYING) (PANTING) (METALLIC CLANKING) NOGITSUNE: Have you figured out my riddle yet? If you answer correctly, we might consider letting them go. Stiles: Letting who go? Your friends. Your family. Everyone who ever meant something to you. We're going to destroy all of them, Stiles. One-by-one. Stiles: Why? Everyone has it, but no one can lose it. What is it? - Stiles: I don't know. Everyone has it, but no one can lose it. What is it? Stiles: I don't know. Everyone has it, but no one can lose it. What is it? What is it? Stiles: I don't know. A shadow. (ELECTRICITY CRACKLING) What was that? It sounded like a power surge. Where's my son? WOMAN: (OVER PA) Dr. Bender to the mental ward please. (PEOPLE CLAMORING) Stiles: You know me. NOSHIKO: Then you remember that I won't be deterred by your choice of host. Even if it's an innocent boy. Stiles: Are you threatening us? Now I'm threatening you. We're not really afraid of your little fireflies. NOSHIKO: If the oni can't defeat you, I know someone who will. (ELECTRICITY CRACKLING) Lydia: Oh, my God.
Riddled