"Come on," Mike closed the door behind them all once they reached the AV room.

"Now what?" Lucas asked.

"She'll find him. Right, El?" Mike said, moving to adjust the radio frequencies.

Eleven sat down in the chair and closed her eyes silently.

"She's doing it. She's finding him!" Mike said.

"This is crazy," Dustin whispered.

Camden crossed her arms over her chest, highly unimpressed.

"Calm down. She just closed her eyes," Lucas said.

"Thank you," Camden nodded.

The lights went out and the boys all gasped. Camden rolled her eyes.

"It's just a light," Camden said, moving to turn it back on again. But, no matter how many times she flicked the switch, it wouldn't come back on.

"Holy..." Dustin trailed off.

There was a loud bang over the radio. Then another, and another, and another.

"What was that?" Dustin asked.

The radio tuned into static again and there was more banging.

"Mom?" Will whispered over the radio.

Camden's entire body tensed as she heard it, so familiar to the void state she'd seen Will in before.

"No way!" Lucas gasped.

"Mom," Will whispered.

"Will!" Mike grabbed the microphone.

"Will, it's us! Are you there?" Lucas said.

"Can you hear us? We're here!" Dustin said.

Camden got a sharp pain in her head and she leaned back against the wall, closing her eyes tightly to try and block out the pain. Blood gushed from her nose and she wiped it away with her hand, using the other to clutch her head.

"Fuck," she whispered.

"Hello? Mom?" Will said.

"Why can't he hear us?" Lucas said.

"I don't know!" Mike shouted.

There was a loud growling over the radio and Camden slumped down the wall, clutching her head in both hands as the pain spread throughout her entire body.

"Mom, mom, it's coming!" Will cried. There was even more static. "It's like home but it's so dark, it's so dark and empty and it's cold! Mom? Mom!" Will sobbed.

The growling got louder and then there was a screech. The fuse on the machine blew and the boys all screamed, jumping back.

The fire alarm started ringing but all Camden could see was darkness. Her head was throbbing, her face was wet from her bloody nose and her entire body felt like it was burning.

"Camden!" Mike shouted.

"Oh!" Lucas grabbed her arms.

They flopped limply back down, her head lolling against the wall as she fell unconscious.

"Can she move? Here, help her up," Mike dragged Camden's body onto the chair Eleven had been on, Eleven grabbing her hand. "This way!" he shouted, pushing them down the hallway with an unconscious Camden.

"What was Will saying? Like home... Like home... but dark?" Mike asked.

Camden watched them from where she was lying the couch. She had just woken up after Lucas had practically carried her home on his bike, and Mike had shoved a Coke and some sweets in front of her to get her energy back up. Eleven was watching her from the other end of the couch.

"And empty," Lucas said.

"Empty and cold. Wait, did he say cold?" Dustin said. Lucas shrugged.

"I don't know. The stupid radio kept going in and out," Lucas said.

"It's like riddles in the dark," Dustin sighed.

"Like home. Like his house?" Mike said.

"Or maybe like Hawkins," Lucas said.

"Upside down," Eleven whispered.

"What'd she say?" Lucas said.

"Upside down," Mike repeated.

"What?" Lucas said.

"Upside down. When El showed us where Will was, she flipped the board over, remember?" Mike flipped the board. "Upside down. Dark. Empty," he said.

"Do you understand what he's talking about?" Lucas looked at Dustin.

"No," Dustin said.

"Guys, come on, think about it. When El took us to find Will, she took us to his house, right?" Mike said.

"Yeah. And he wasn't there," Lucas said.

"But what if he was there? What if we just couldn't see him? What if he was on the other side? What if this is Hawkins and this is where Will is? The Upside Down," Mike motioned to the board.

"Like the Vale of Shadows," Dustin said.

"Camden said she saw him," Lucas turned to her. "Where was he?" he asked.

"I don't know. He was lying on the floor in this black void thing," Camden said.

"Visions," Eleven said.

"It wasn't a vision!" Camden snapped.

"Camden, I know you don't want to have powers but it seems like you do. El used you as a battery source before to talk to Will. That's how we got to hear him, because it wasn't working with just her. You're special like her and we don't know how, but you are. Best to just roll with it than not," Mike said.

"But I can't do anything like she can," Camden crossed her arms over her chest.

"Why don't you try going back? Like, go into the void how you did with Will and find out how you did the things before you left?" Lucas suggested.

"Look," Camden sat up, looking at the boys. "I would love to find Will. I really would, but I am not like her. I'm not, okay? I can't help you with this. So, please, just drop it," Camden said.

"Camden, whatever happens, whether you can go into the void or not, it's not going to change anything about who you are. You're still going to be Camden Harrington, and your dad is still going to be your dad. But she says you can find Will and I know he would do the same for you, if this was him in your position," Mike said.

Camden stared at him for a few seconds before she saw movement out of the corner of her eye. She turned, seeing Eleven holding out a small radio and a blindfold with a small smile.

"It's okay," Eleven said.

Camden stared at her for a few seconds before sighing.

"Fine. Whatever. But you can't get mad at me when it doesn't work, and it won't work, because I'm not like her. I'm not," Camden said.

"Thank you," Mike sighed, rubbing his face tiredly. "For trying. It means a lot to me, and I know it'll mean a lot to Will when he comes back," he said.

Camden wrapped the blindfold around her head and Eleven turned the radio on for her. Camden sat there for a few seconds before closing her eyes behind the blindfold, grabbing hold of the couch arm so she could stay centered and know where she was, even if this vision thing did work.

She sat there for a few seconds with nothing happening. Then, she felt a trickle of blood slide down her face and her body fell back into the couch.

"That doesn't happen with you. You don't go unconscious when you do it. Is she okay?" Lucas said, looking between Eleven and Camden. Eleven nodded.

"New for her. Hard," Eleven said.

The boys nodded and turned back to Camden, waiting for her to return out of the void.

Camden looked around the black void with a frown. She was wearing the skirt and t-shirt she'd been wearing that morning, though she was barefoot again and didn't have her jacket on.

Footsteps sounded from in front of her and she turned around, seeing what looked to be a long corridor behind her. A blonde man stepped into the hallway with a man in a doctor's coat beside him.

Camden stared at the blonde man with a frown. He was the man that was outside the window the night her dad died, though she didn't know who Dr. Brenner was to her or why he had come to find her.

The man in the doctor's coat, however, she knew instantly. It was her dad. It was the man in her nightmares that sacrificed his own life for hers. It was the man in her nightmares that was protecting her from the blonde man outside the house. He died so they wouldn't get her and, presumably, take her back to this lab.

But it didn't make sense. Why would he have done all of that for her if he was one of the main doctors or scientists on her case? Something must've changed between whenever this was to when she was six years old, and she didn't know what or understand any of it.

"Thirteen is exceptionally talented, Dr Brenner. She's the best out of the lot," the man in the doctor's coat spoke to the blonde man, Dr. Brenner. He nodded as they walked down the hallway.

Camden looked at them for a few seconds before following. She was torn between wanting to know what exactly Thirteen, who may well be her, was capable of, but she also knew this lab wasn't going to help her find Will.

But, if Mike and Eleven were right and she was like Eleven, maybe finding out if she had powers would help them. She'd be able to learn how to use them and they might help them find Will. Maybe she would be able to get him over the radio like Eleven could. And, call her selfish, but she needed to know who she really was, and this was her chance.

"Tell me, Dr. Smith," he said.

"Well, for one, the girl has super strength when she wants to use it. Someone tried to take her plate yesterday and she killed them with her bare hands. She shows signs of trajectory manipulation powers, or telekenises. She can move things with her mind, like her cup when she's thirsty and the guard is holding it. She can also manipulate people. She rumours it into existence by looking into their eyes and telling them what she wants," Dr. Smith, Camden's father or not father, said.

"She's gifted," Dr. Brenner commented.

Camden almost tripped over in shock. If Mike and Eleven were right and she was Thirteen, she was fucking powerful. This might've been the tricks her dad told her not to use in her nightmare.

"There's more, sir," Dr. Smith said.

"Continue, then," Dr. Brenner said.

"She can talk to dead people. We put her in the capsule three days ago and she spent hours talking to dead people, having full conversations with these ghosts. We gave her a list of questions to ask, ones we could find the answers to in books or online, and she knew the answers just from the conversation," Dr. Smith said.

"Dead people?" Dr. Brenner repeated, his eyes lighting up with glee. "How extraordinary," he said.

"Extraordinary?" Camden whispered. "More like a one way ticket into a fucking nuthouse. What the fuck? Why is that one of my superpowers? Who wants that superpower?" Camden whispered.

Dr. Brenner and Dr. Smith didn't even notice her talking, so Camden assumed they couldn't hear her or see her, or detect her presence.

"There's, uh, still more, sir," Dr. Smith said.

"More?" Camden squeaked.

"More?" Dr. Brenner said. "By all means, continue," he said.

"She can do minor time jumps. She creates a portal, steps through it and appears somewhere else. I'd like your permission to work on expanding her distance with them. If she can jump across the country, it'll be revolutionary for us," Dr. Smith said.

"Revolutionary, indeed. Yes, you have my permission," Dr. Brenner said. "Is that all?" he asked.

"No," Dr. Smith shook his head, dropping his eyes to the floor with a frown.

"There's more? Jesus fucking christ, what the fuck?" Camden said. "How does this shit even happen? How are people born this way? How was I born this way?" she ranted.

"We've been aggravating her over the past few weeks, but we only got a reaction out of her yesterday. Well, we got two reactions out of her," Dr. Smith said.

"Two?" Dr. Brenner said.

"The first, it was like her arms grew into tentacles. She could control them easily, used them to kill six men at once by crushing their necks," Dr. Smith said.

Camden stopped in her tracks. She did that? Camden knew she could be violent, but only when she had to hold her own in a fight. She always won, but she would never kill anyone. Never. Not after her dad died for her.

She already had someone's blood on her hands, whether it was her fault or not that it happened. She wouldn't do anything like what this man was saying. But this man was the same man in her nightmares and he had died for her, so she didn't really know if she could trust what she thought she knew before things started happening here.

"Oh my god, I'm going insane," Camden muttered, rubbing her temples tiredly.

"Tentacles? Like an octopus?" Dr. Brenner said.

"Kind of, but not really. They don't look like any tentacles recorded in any animal species. They look like things from the myths and legends we've been researching. I've compiled a folder of our ideas of what they could be," Dr. Smith said.

"And the other reaction?" Dr. Brenner said.

Dr. Smith sighed, running his hand through his hair.

"She had this white glow around her and she used mental abilities to kill everyone in the room with her. She did it with her mind, like Eleven can do. It took us three hours before she stopped killing people we sent in to calm her down and stopped glowing," he said.

"I'm a human glowstick?" Camden whispered. "And a murderer, apparently. Great. Fucking brilliant. Absolutely fucking brilliant!" she said loudly.

"That is fascinating. Absolutely fascinating. I would like to see this tentacle thing," Dr. Brenner said.

"She's in there right now," Dr. Smith said.

They opened a door and headed inside. Camden hesitated before following.

It was like a viewing area, the part they were in, with a two way mirror behind bulletproof glass. The room on the other side looked like a hospital room, just without the equipment.

A little girl was strapped to a wall by thick leather belts around her ankles, upper arms, neck and stomach. Six men were in the room with her, shouting threats at the little girl.

Camden stared at the little girl, stepping closer to the mirror. The little girl had a shaved head, but the fuzz was the same dirty blonde colour as Camden's was now. And those green eyes, Camden would recognise them anywhere, considering she stared at herself in the mirror often enough when she was playing makeovers with her mom or Steve, if she could drag him into it.

It really was her. She really was Thirteen, and the man she thought was her dad wasn't really her dad, just a doctor or scientist who worked with the man who had been there the night of the fire to hurt her.

"Thirteen, we want you to use your tentacles, okay?" Dr. Smith said over the intercom.

"Let me out! Let me out! I'll be good, I promise!" Thirteen screeched, tears streaming down her face.

Camden stared at the little girl, stared at the little girl she once was, and could feel the tears streaming down her own cheeks to match. This was torture. They were torturing her.

"Thirteen, use your tentacles," Dr. Smith said.

"Do it, you stupid bitch! Or we'll kill you!" one of the men in the room with her shouted.

Thirteen started crying heavier as more and more of the six men joined in with threatening her and taunting her. Thirteen's face screwed up and she let out a scream, her body shaking violently in the restraints holding her to the wall.

Thirteen's arms started elongating, the skin turning black from her shoulders down as they turned into something that wasn't human. It was the tentacles, like Dr. Smith had described. They were black and slimy, with what looked to be teeth on the underside of them.

They stretched up into the air, each arm splitting into three individual tentacles to make six in total. They shot out into the air, twisting and writhing as they grabbed the men and sank their teeth into their bodies.

Blood started pouring onto the floor as the tentacles slowly crushed the men until their bodies exploded in her grip. The blood and guts splattered onto the window and Camden flinched back, mouth open wide in shock.

She stared at the mirror in horror, stumbling back away towards the door.

This was too much, way too much. She had just watched herself at maximum five years old kill six people with tentacles that came out of her body. She had listened to everything the man she thought was her dad said she could do and he said this wasn't the first group of people she'd killed.

So, not only did she have her dad's blood on her hands, but now she had these people's blood on her hands, too. And her childhood, what little she knew about it, it was a lie. Her father hadn't died for her because he wasn't her father. He was the man who told this Dr. Brenner what she could do. He was the man who probably tortured her to the point of them discovering she had these superpowers, or at least the man who had put the order in place.

And it would make sense, when she thought about it. Something must've happened in this year between the ages of five and six for Dr. Smith to have gone from this to dying to save her from Dr. Brenner getting her out of that house.

"Magnificent. Absolutely magnificent," Dr. Brenner beamed. "Keep working with Thirteen. I want her to be able to do this upon command, without provocation," Dr. Brenner said.

"Yes, sir," Dr. Smith said.

Dr. Brenner turned to leave, but turned back and put his hand on Dr. Smith's shoulder.

"Excellent work, Callum. Excellent," Dr. Brenner smiled.

He left the room and Camden looked back at the mirror, seeing water was being sprayed on it from the ceiling to hose it clean for them to see through.

Her younger self was still strapped to the wall by her restraints and she was still sobbing, but she was now covered in blood.

"Bad Thirteen, bad Thirteen, bad Thirteen," she whispered to herself.

Camden looked at Callum Smith, staring at the man she had believed to be her father. He was alone, now, in the viewing room, and was crying himself.

"I'm so sorry, T. I'm so sorry," Callum said over the intercom.

"Bad Thirteen, bad Thirteen, bad Thirteen," Thirteen cried.

Camden stared at her younger self for a few more seconds before she turned and ran out of the viewing room. She was back in the black void, now, and she reached up and yanked the blindfold off her head.

Camden wiped her bleeding nose with the back of her hand, staring blankly at the boys and Eleven in front of her.

"You were out for a while. We were worried. You okay?" Mike asked quietly.

Camden shook her head slowly.

"What did you see?" Mike asked.

"Not Will," Camden whispered.

"Was it your dad?" Lucas asked.

"No. Look, it isn't important to finding Will. Your big idea, it's fucked. So, what do we do now? How do we find him?" Camden asked.

Eleven eyed Camden curiously, but she didn't say anything, so the boys didn't continue bringing it up.

"The Vale of Shadows, Dustin?" Lucas said.

Dustin grabbed a D&D book off the shelf and opened it up.

"The Vale of Shadows is a dimension that is a dark reflection or echo of our world. It is a place of decay and death. A plane out of phase. A place of monsters. It is right next to you, and you don't even see it," Dustin read out.

"An alternate dimension. But... how... how do we get there?" Mike asked.

"You cast Shadow Walk," Dustin and Camden said.

Dustin turned to Camden with wide eyes.

"Holy shit, you really do know D&D," he said.

"I told you, I do have some culture," Camden said, smiling weakly at him.

"In real life, dummies," Lucas said.

"We can't shadow walk, but... maybe she can," Dustin pointed at Eleven.

"Do you know how we get there? To the Upside Down?" Lucas asked. Eleven shook her head. "Oh, my God!" he groaned.

"Well, all of your great big ideas seem to be failing," Camden said, taking a sip of her coke. "Now what, dick faces?" she asked.

"Are you always this mean?" Mike snapped. "We're under a lot of pressure, here, and we've never done any of this before. Give us some leeway," he said.

"Okay, for one, I am always this mean. It's my love language," Camden said. "And, for two, fair enough. I'll shut up for a while," Camden nodded, lying back down on the couch.

"Thanks," Mike muttered, running his hands through his hair.