Finn and Jake have set out to explore where no one else has bothered exploring before, the dark recesses of the forest where Finn was first abandoned as a baby.
"Princess Bubblegum believes that there is a ton of stuff here that she says can advance her science-y stuff." says Finn the human.
Jake the dog groans in discontent, "There better be something worth while in there. I've heard stories about a curse that anyone who hangs out there long enough will die and scream bloody murder, in that order."
Finn laughs, "Quit being superstitious. Let's just go in, get the stuff, and get back to Princess Bubblegum."
Jake grumbles to himself, then raising his voice, "I'm not superstitious, I'm paranoid, and those stories are real!"
Finn and Jake venture on deeper into the forest. Jake lingers back a little and hears an ominous sound. "Fiiinn."
Finn moves a group of leaves from his line of sight. He gasps and says, "Jake! Come here, I found something!" Finn is pointing at a big black square structure almost completely covered in vines, collapsing at one corner. "That's gotta be where the stuff's at."
Jake says reluctantly, "I don't know, Finn. Are you sure?"
"Of course, it's a big black box. How could it not be?"
"Hmmm."
Finn and Jake walk inside the structure. "Woah..." say both of the adventurers, admiring the massive architecture stretching deep underground.
"Mathematical! Let's go!" says Finn ready to jump off the railing.
"Woah, dude!" Jake wraps his elastic arm around Finn, preventing Finn from falling. "We should think about this."
"OK." said Finn. "We can go down the looooong flight of stairs if you want."
"Screw that! I'm jumping with you!" Jake jumps off the railing, holding Finn, and stretches himself into a parachute.
When they reach the ground, Finn pulls out a device that Princess Bubblegum gave them at the beginning of the quest.
"According to this thingamajig we are right where we need to be."
"Woah woah woah. Are you telling me that you had that thing this whole time and you let us wander around the forest for hours when we could be back home by now playing video games?" Jake asks angrily.
"Yeah. I was honing my exploration skills for this sort of thing. I just used this to make sure I was right."
"Can't argue with that." Jake says agreeably.
"Great. Now Let's get to writing this stuff down."
Seconds later both Finn and Jake hear snarling in every direction and glowing red eyes staring at them, peering out from the shadowed edges of the room. Every pair of eyes came out of the shadows with a black, withering humanoid body, and white, sharp teeth. They are walking on all fours, slowly crawling towards Finn and Jake.
"What are these things?" says Finn intrigued as he pulls out his sword raring to fight.
"I don't know, man. But they are UGLY." says Jake also raring for a fight.
"Ugly or not, these guys are going down!" and one of the creatures lunges at Finn. Finn then promptly slices it in half. As the first creature's two halves fly, it disintegrates and turns into ashes. Jake inflates his hand and punches a fistful into the air, knocking them into a wall, also turning them into ashes. The fight goes on and Finn manages to take a breather and finds a human trapped in a stasis pod. Finn can't resist, he had to open it, for the sake of being a hero and to find another one like himself . "Jake! Distract them as I free this other human!"
"Don't worry bro, I got this!"
Finn proceeds to try to break the glass with his sword. He swings his sword and it did not even so much as make a scratch. After trying so many times Finn pretty much gave up when he punches the pod in anguish, and lays one hand flat on the console, the whole thing lights up and a hissing sound comes from the the pod, opening up and revealing a human boy inside. He was wearing a t-shirt, trench coat, blue jeans and a pair of sneakers. The previously trapped human opens his eyes, staring at Finn, reaching for him, and saying in an exhausted voice, "Fiiinn." Leaning forward, he collapses and Finn catches him, nearly collapsing himself because the guy was so heavy, being weighted down by all the stuff in his jacket. Finn looks to his side and screams as one of those ugly creatures pounces on him, knocking him over and pinning him to the floor, dropping the ex-captive in the middle of it. Finn struggles to keep the creature from eating his face off. Jake, covered all over with the hideous creatures, yells at Finn, "Finn, get up!" then Jake sees the person they recently rescued get up and grab Finn's aggressor by the neck and say, "Don't touch my brother." and he throws the creature at Jake so hard that not only did it kill the thrown creature but also jostled off the rest in a wave of sheer force, allowing Jake to jump out of the way, sit back and see what happens next. The horde now has its eyes set on the newcomer and they charge him all at once.
The newcomer pulls out two swords from behind his waist, under his jacket, and takes an aggressive stance. One of his swords starts glowing a light blue and a loud humming can be heard, and when a soft chime rings through the air, the Newcomer leaps up and thrusts his sword forward, accelerating him so fast that he was at the other side of the horde in the blink of an eye and a large number of the creatures disintegrated, he turns around to finish the fight.
Striking hard and striking fast, the creatures turn to ashes at every cut. Finn and Jake just stood there in awe at the piles of ashes the newcomer just made. The newcomer was standing in the middle of the room like those awesome anime characters you see on TV, staring intensely in front of him, his jacket blowing in the wind that wasn't really there. Then he faints from exhaustion. Finn and Jake didn't move for five seconds to go help the newcomer up, even then, they walked slowly, talking about how amazed they are. When they finally got to the fallen newcomer, they picked him up, forgot what they planned to do and brought him to Princess Bubblegum's castle for immediate medical attention.