This is my first fanfiction…I do not own Adventure Time.

Fionna stared out the tree house window at the knife storm. Millions of sharp, deadly blades plummeted toward the earth. There is no way she is going out there today. Sigh. This is going to be a long, boring day, she thought.

SLAM!

What the bazoobs was that?! She wondered. She left her room and entered the kitchen to investigate the strange sound. Cold water slowly dripped from the faucet and into the sink. It was eerily quiet. I swear I heard something, Fionna thought, disconcerted. A freezing gust of wind caught her off guard, and she looked up to see that the window was open. She reached up and closed it. All of a sudden, there was the sound of something heavy being dropped! Fionna sprinted down to the treasure room, following the noise. It was pitch black, but it looked like…was that treasure chest tipped over before? Suddenly she got the chilling feeling that something was very close behind her, and whirling around just in time she saw a shadow escape up the ladder! She ran back to the kitchen. Looking up, she saw that the window from before had blown open again; the wind had picked up tremendously. As she watched a knife was blown through the window! She lunged out of the way before it could impale her, but heard a screech of pain behind her. However, when she turned around, all she caught a glimpse of was the same shadow as before retreating up to her bedroom.

Fionna set her face into a look of determination. She was scared, but she had to protect her house. And now, whatever this thing was had been wounded. She could sneak up and ambush it! One by one, the brave adventuress climbed the rungs of the wooden ladder. Deep breaths, in and out. You can do this. When she reached the top of the ladder, she slowly and quietly peered up over into the room. The candle had been blown out, and she could just make out the outline of her bed and the window, which offered some light. Fionna pulled herself up, careful not to make a sound so as to not startle the creature. When she had gotten into a standing position, a curled-up being was revealed in the corner. She could see little drops of blood on the floor, leading to the shadow. Ever so deliberately, she crept closer and closer to the figure. When she was within striking distance, she pulled a blanket over its head. The monster reacted immediately, flailing about and trying to get free. Eventually Fionna managed to wrestle it to the ground and tie it up in the blanket. She could now see that underneath was the form of a person, so it must be some sort of goblin thief. In one swift motion, she pulled the blanket from where its head should be, revealing—a…a…a teenager. He looked like a human, but his skin practically shone in the light from the window. At this point, he had stopped struggling, accepting his fate of being discovered. The courageous girl stood back and took out her sword, prepared to ask some questions. "Who are you and what the flip are you doing in my tree house?!" The boy looked up at her, hurt by wherever the knife had struck him, and answered:

"My name is Marshall Lee. I…I was planning to rob your house and get out, but then the knife storm started, and I was trapped."

Fionna pressed her sword farther toward the young man, and said: "Rob my house, huh?! Who do you think you are? I'm a hero, and it's my job to stop evil like you!"

He looked pleadingly up at her and said, "I…I'm the vampire king, so I guess I'm as stereotypically evil as you can get. But…I know you want to bring me to justice or whatever, but first can you help me not bleed out?"

She looked down and saw that the knife had struck him in the forearm, and the state of the wound was not very good. "…Fine. I'll help you, because even villains don't deserve to die."

He smiled a half-pained, half-grateful grin, revealing a set of dazzlingly white teeth, two of which confirmed that he was indeed a vampire. Fionna didn't know much about vampires, but she knew enough to stay away from them—they were pure evil. She dragged the boy by the wrist of his good arm, setting him down on a chair in the kitchen. She dug through a cabinet, pulling out bandages and all that she'd need to fix up his arm. He remained on the stool the entire time, probably because he knew it was a bad idea to try and escape—one bleeding arm, one deadly knife storm. She took about ten minutes to clean and dress his wound, and Marshall tried not to wince in pain. She looked through the cabinet once again and found some pain killer, and after giving this to him, she turned to put everything back in the cabinet. However, when Fionna turned back around, the vampire king was nowhere in sight! Glob darn it, she thought angrily. "The knife storm is still raging outside, so where could he have—AAAAAAAH!"

"Boo." Said Marshall Lee, after she had turned around and found him floating inches away from her. He grinned once again, flashing his teeth. Fionna backed up a few steps, but he just flew closer again. "So I don't really understand…why does a good little hero like you even care if I'm hurt?" He asked. She continued to back up, edging closer and closer toward the wall. "That's just it…I'm a hero, it's my duty to help everyone in need, even if they're…scum like you."

"Hmph. I suppose that I am scum. Even so, it's not like I'm some heartless monster. Right?"

"I…I guess so…?" At this point Fionna's back was beginning to press up against the wall. She realized her sword was upstairs in her room—there was no way of reaching the ladder on the other side of the kitchen. As the two became uncomfortably closer and closer, she was forced to look into the vampire's eyes. They were deep red, and she soon found herself entranced in them…What had he said? The vampire laughed when he realized she had missed the question. "I said, you and I aren't so different, are we?" Fionna narrowed her eyes.

"I have never dreamt of stealing anything." Marshall's face drifted ever closer to hers, the space between them only centimeters. He knew she was defenseless. "Well, I didn't actually steal anything, did I?"

"I…I guess not. But…you had the intention of stealing treasure."

"Did I? Or did I plan on stealing something else?" As his face was nearly touching hers, he was in perfect striking distance. "Wh…what do you mean?" Marshall suddenly darted forward; Fionna clamped her eyes shut and prepared for the worst, but instead of attacking her, he kissed her on the forehead. With that, Marshall Lee flew swiftly out the window. Fionna opened her eyes and stared at the window in confusion. She touched her fingers up to her forehead, wondering about the vampire boy. Was he really trying to steal treasure, and tried to confuse me as a distraction so he could escape? What did he mean by 'Or did I plan on stealing something else?' Is that related to… Did he like her? Had he come only for her, or did his plans of stealing change when she helped him with his wound? No, Fionna decided—she'd just have to go ask him.