The Prisoner

by rbvictor

When Finn and Jake accidentally release an ancient evil from the palace dungeon, its up to them to track him down. But who is this prisoner, and more importantly what is Princess Bubblegum hiding? rated T to be safe.

1. Chapter 1

Warning I don't own Adventure Time or any of its characters. I only own my OC Roy.

The Candy Kingdom outside Princess Bubblegum's castle

"Thanks for helping me pack for the science convention Finn." Princess Bubblegum said as she hopped on her giant flying swan.

"No problem PB." Finn said as he passed her a suitcase.

"Now remember Finn, what ever you do don't go down in the old castle dungeon." Princess Bubblegum explained as she prepared to take off. "The dungeon contains one of the most dangerous criminals to ever plague the Candy Kingdom."

"Who is it?" Jake asked intrigued.

"Yah PB who is this guy? Finn asked.

"We do not speak his name. He has been in that dungeon ever since my parents ruled the Candy Kingdom." Princess Bubblegum said with a dark expression on her face. "Just promise me you won't go into the dungeon."

"Alright Princess." Finn said disappointed. Princess Bubblegum then flew away on her swan.

"So what do you want to do now Jake?" Finn asked as they walked back into the castle.

"Hey lets check out that dungeon." Jake replied.

"We just promised Princess Bubblegum that we wouldn't go down there." Finn said responsibly.

"I know." Jake said sadly. "Hey Finn, Bubblegum said that the prisoner had been down there for years right?"

"Yah, why?" Finn said confused.

"Well how do know he hasn't escaped." Jake said

"We don't." Finn said starting to understand where the conversation was going.

"The responsible thing to do would be to check the dungeon and see if he's still there, right?" Jake said.

"Your right." Finn said as he stopped in front of the dungeon door. Finn then opened the door and peered into the dark. The dungeon consisted of a long set off stairs with a stone door at the end.

"What's that?" Jake asked lifting his ears.

"What's what?" Finn said.

"You don't hear that?" Jake asked.

"I don't hear anything." Finn replied. "Come on." Finn then drew his sword started walking down the stairs. As he reached the bottom he paused. Finn could just make out the sound of an electric guitar coming from the other side of the door.

"What the math?" Finn said as he pushed the cell door open.

Well what do you think so far? Feel free to message or review if you have any questions or suggestions.

P.S. For another great adventure time fanfic check out Teller14-djb's Into the Wormhole.