"Dean what the hell?" Sam asked, as you stood there with your mouth wide open.

"This dude, along with a couple of others tried to jump me outside the pizza joint. Guess they decided to make our job a little easier." Dean explained, as he gave the blonde haired man a rough shove down the hallway, and you and Sam could only follow behind. About three steps into the hallway, Sam's phone started going off.

"Guys, I gotta take this. I'll be right back." Sam said, heading back into the garage. You stood there, torn. You wanted to follow Dean, and see what was up with the Stein family. But you also wanted to turn around and see what had Sam so worried.

"Y/N, you coming?" Dean asked, pausing in the hallway for a moment, raising his eyebrow as he looked at you. Giving one more glance back at the way Sam had taken off to, you followed behind Dean.

"Wow, you have her trained real well, don't you." The guy said, earning another rough shove from Dean.

"So, does that mean you two are more than partners? Cuz if that's not the case, I would like to take a chance with her. She's sure a pretty little piece of..." He said, before Dean rammed his head into the door frame.

By this time Dean had made it to the dungeon, and you rushed ahead, opening the fake door. "Ooh, what is this place? It has it's own hidden doors, I love it." The blonde guy remarked, and you heard another groan before Dean followed you in.

You grabbed the handcuffs, and started to pull the chair over, but Dean shook his head. So instead, you attached the cuffs to the chain hanging from the ceiling, and Dean cuffed your prisoner.

"So, let's start off easy." Dean said, standing at the edge of the devil's trap, his arms crossed. You were standing next to him, but slightly back, leaving him at the center of the interrogation. "How about you give us your name."

"The names Eldon. Eldon Stein. You might have heard about our family. Our family is a legend." He replied, standing there easily, as if he wasn't cuffed to the ceiling.

"Stein, doesn't ring a bell. Maybe you're not as famous as you think." Dean shot back, as you tried to think of if you had ever heard that name before.

Eldon just shrugged. "The real family tree. The name was altered out of necessity. You have chanced upon a lineage with a long and proud tradition . . . And some unwanted notoriety. One of Europe's oldest families. The house of . . . Frankenstein."

Before you could answer, Sam was back, standing beside Dean. "Frankenstein? You've got to be kidding me."

You glanced over at Sam, seeing his eyebrow creased in frustration. Inching over towards him, you whispered, "Is everything okay?"

He subtly shook his head, before your attention turned back to Dean, who was still talking to Eldon. "And why should I believe you? Frankenstein was just a myth. And believe me, we should know, we hunt monsters."

Eldon just shook his head. "Aren't most myths born out of truth? And what else would explain the fact that I was able to jump out of a three story window."

Dean took a step forward, really getting into the argument with the Stein. "So where's the rest of your tribe? Where's Daddy Frankenstein? And why did you want that book so bad?"

"They are so deep underground, and spread so far around the world, you will never be able to find them. That's what's so amazing about our family. One fails, the next one steps right up. We are the greatest Army." He started to say, but his eyes caught a glimpse of Dean's Mark peeking out from his shirt. "If you give me the book, I can tell you how to get rid of the Mark." He tried to trade, and your heart stopped.

Dean stiffened up, glancing back at you and Sam, before glaring at Eldon. You looked at Sam, who seemed frozen in his spot. Just then his phone went off, and he looked down at it, cussing. "I've got to take this." He said, causing Dean to turn on him in disbelief.

"Really Sam? We're in the middle of an interrogation, and you have to answer your phone?" He questioned.

Sam seemed so torn, and you wished you could help him. But you weren't sure how you could step into this sort of situation without making matters worse.

"I know Dean, but this is important." He answered, before heading out the door.

Dean sighed, before turning back to Eldon. "So, back to our conversation. You know the book was burned, right?"

Eldon smiled widely, and you took a step closer to Dean, as it unsettled you. "The book is eternal, nothing can destroy it. Now hand it over, and we can talk about getting that Mark off of you. Throw in the woman too, and it will be for sure taken care of." He said, before winking at you.

Dean grabbed your hand, pulling you into the empty hallway. "Sam burnt the book, didn't he?" He asked you, staring deeply into your eyes, his own wary.

"I thought I saw him burn it. He tossed it onto the fire." You explained, trying to keep your heartbeat steady, while inside you were freaking out.

His grip on your wrist tightened, painfully, but you couldn't pull it away. "Y/N, I swear if you're lying to me." He threatened, but didn't say anything more. He kept his grip on your wrist, pulling you down the hallway, into the library, where Sam was still on the phone. Sam caught sight of the two of you, his eyes growing wide as he saw Dean's tight grasp on your wrist.

"Listen, I've got to go. You figure something out." He said into the phone, before ending the call. "Hey guys. What's up?"

"Eldon was just telling us something very interesting." Dean started, pulling you closer to where Sam was standing. You watched as Sam gulped, his eyes trailing to you, before turning back to his brother.

"Yeah, what was that?" Sam asked nervously, but was interrupted by the sound of a door slamming shut. Dean let go of your hand, rushing out of the room and down the hallway, with Sam following close behind. You came behind, much slower, rubbing your wrist.

Both Sam and Dean were standing at the entrance to the dungeon, identical looks of utter disgust and disbelief on their faces. "Y/N, I don't think you want to see this." Sam started, but it was too late. You had already caught a glimpse of the mangled appendage hanging from the cuffs, blood slowly puddling on the ground.

"He ripped his own arm off?" You asked in disbelief.

Dean nodded, before turning and giving the two of you a disapproving look. "Yeah, and now he's back out there. I'm going to go see if I can find him. You two stay here. And I think when I get back we need to sit down and have a conversation."