I'm back, apologies. Here's Chapter Ten:

Dean and Emma made it back to the station and entered together. The looks of surprise and relief on Sam and Mary Margaret's faces were practically identical.

Dean leaned against the wall in Emma's office and she sat down in her chair at her desk, propping her feet up. Sam and Mary Mary Margaret were left standing awkwardly and they both shifted in discomfort. Dean crossed his arms, deciding to make up for what an ass he'd been in the only way he knew how.

"So, Sammy, you two come up with any theories?" he questioned, gesturing with his finger to them. They both drew a deep breath and glanced at each other. Sam scratched his head.

"To be honest," he said dejectedly, "we got nothing about where Henry is." Mary Margaret scoffed but then scrunched her forehead in thought.

"Well…" she started, "nothing that makes sense to the other person. That's probably... closer?" She glanced at Sam for confirmation and he bobbed his head. Dean cocked his head in confusion. Mary Margaret sighed with embarrassment.

"Well, I think it was a troll that somehow had access to a portal," she mumbled.

"Um…," Sam started hesitantly, sending a wary glance to her, "a demon. They can travel pretty quickly." Mary Margaret huffed.

"At least trolls are real," she responded instantly.

Sam shook his head and rubbed his face. "How many times do I have to tell you demons are real?" he shot back, like they had had this conversation a thousand times while Dean and Emma were gone.

"Oh, god," Dean grumbled, rubbing his eyes. "Let's just say they're both real!"

"He was possessed by something," Emma said quietly, drawing everyone's attention. She stood up and began to pace the room. "Because it was him, I mean it was his body and his voice. It was just his eyes-" she cut off and stared at the floor.

"You said they were black?" Sam asked gently, to make sure it wasn't just something he'd heard from Dean. She nodded.

Mary Margaret worriedly rubbed her chin. "Will David be okay? Will that hurt him?"

"Physically, he should be fine. Emotionally, psychologically, that's a whole other story," Sam said. "He might've been awake and saw what the demon made him do or he might've been out. But Mary Margaret, if David is as strong as you've described him, he was probably fighting for control the whole time… it might be best not to get your hopes set too high."

"I just want him back," Mary Margaret whispered, tears welling up in her eyes. "If he's back, we can fix it."

Emma folded her arms and stared at the ground with a frown. "What would a demon want with Henry? What's the benefit of-," she trailed off, her expression turning to one of horror.

"Oh, no,' she breathed, sinking slowly to the floor.

"What is it?" Dean asked, squatting down next her.

"'The Heart of the Truest Believer'- David was talking about Henry and said something about him having the Heart of the Truest Believer. They want his heart," Emma deduced, hugging herself.

"Man," Dean said, sitting down. "That's creepy." Sam glared at him pointedly and Dean rolled his eyes in response.

"So they want to kill Henry?" Sam asked.

Mary Margaret shook her head, wiping at her eyes. "They wouldn't have to kill him. Just take out his heart with magic and he'd still be able to live. But whoever holds the heart controls it. This is a mess," she finished sullenly.

"Well, let's read that stupid fairytale book and find out what it has on the Truest Believer, okay?" Sam advised. "Dean and I can do the research. You guys get some rest."

"No, we're coming with you," Emma said. "Or at least I am."

"We both are," Mary Margaret affirmed, offering her daughter a hand. Emma accepted in and heaved herself up.

"Get up, Dean. We have better things to do besides sitting around all day," Sam said.

Dean scoffed as he stood, walking over to his brother. "I can make sure you're never able to sit again," he hissed into Sammy's ear. Dean pulled away and glared while Sam just chuckled.

"Alright, let's head out," he said, gesturing to the door. "Ladies first. That means you, Sammy-boy."

"You just contradicted yourself," Sam retorted.

"Shut up and get out."

Thanks for sticking with this story guys, I appreciate it so much. Your reviews mean a lot to me.