Hello, Archwroter here. I'm back with another story readers. I like the idea of Finn and Jake being detectives and lawmen, so I got this. Read and don't forget to review! I SINCERELY DO NOT OWN ANYTHING from Adventure Time...

Chapter 1: Prologue

It was raining heavily in Ooo. The creatures around Ooo were hurrying into where they live in, doesn't matter if they're a Candy person or a Water Elemental. Indeed this post-apocalyptic land have been home to many creatures, but no humans could survive the Mushroom War. Therefore, humans are not spotted in Ooo.

But there were still some humans that managed to survive the Mushroom Bomb and lived on till today. And one of them lived in a nearly abandoned and destroyed wooden house with his children. In that house, a six year old girl that looked like a Japanese sat on the floor of the living room. She was playing with a stuffed tiger before her older brother came into the living room. "Hey, Shoko. What's up? Do ya' need anythin'?" the 10 years old boy asked to his sister. "Naw, Finn. Thanks for askin'," she replied to her brother. Finn messed with his sister's straight, long hair and she laughed. "YOU STUPID MONKEY BASTARD! WHERE'S MY FUCKING BEER?", a voice was heard from the next room. "Crap! I'll be right back, Shoko" Finn said to his sister before running to the fridge to get some beer for their father. They're family was troubled and everyone noticed, even Shoko. Their father, Martin was a slacker. He just sit all day in front of the TV and yells at Finn to get him more beers.

Martin never loved his children, never ever. Constantly, Finn would get bopped and knocked around by Martin just for some small mistakes. Shoko would sometimes get slapped around too, only if she made a mistake. But this wasn't so often since Finn would take the heat for his sister's mistakes, even if it meant having Martin to crack his skull. That day was different though. After Finn got the beer for Martin, Martin quickly chugged it and held the empty bottle in his hands. "What the hell were you doin'? I told ya' to grab some beer for me, not waste time playin' around with your stupid sister!" Martin yelled at Finn. Finn looked at the floor and said, "I'm sorry, sir. It's my mistake, sir...". Shoko was getting worried that Finn might get bopped by Martin in the other room so she peeked in. "C'mere you. I'm gonna teach you another fucking lesson!" Martin said as he stood up and walked to Finn. He punched Finn in the gut causing him to fall. "IF I TELL YOU TO DO THINGS, DO IT! DON'T WASTE TIME!" Martin yelled before breaking the beer bottle by slamming it on Finn's skull. Then, he was kicked to the side of the room. Martin noticed that Shoko was peeking so he just went over and pulled her in by her hair.

"Why you, little! I've had enough of you stupid kids!" Martin yelled in anger as he pulled her hair. "I USED TO BE A HAPPY MAN! BUT YOU CAME INTO MY LIFE AND GAVE MORE BURDEN!" Martin yelled while glaring at Finn, who was bleeding down his nose and mouth. He glared at Shoko next and yelled, "AND YOU, DAUGHTER OF A BITCH! YOU'RE JUST LIKE YOUR FUCKING ASIAN WHORE MOTHER! I NEVER EVEN WANTED YOU!". Shoko was also slapped and sent to the floor hard. Martin was getting ferocious again and the children were getting bopped again. Finn ignored his pain and helped his sister up. "Fuck all your shit! Dad, we're outta here!" Finn yelled as he brought his little sister outside. "Oh yeah? Go ahead! See how you'll live without me!" Martin said before slamming the front door shut. So Finn and his sister began to survive the outside world on their own. They became thieves to support their living, although Shoko was the one who was eager to steal. Finn didn't agree about being a thief, which led to their separation.

8 years later...

"Jake. Here's your donuts, man..." Finn said as he handed Jake the bag of donuts. "Thanks, man. Can we visit the cemetery on our way home?" Jake asked which Finn responded with a nod.

Phew! There's the prologue. It took me quite a deal of time to get an idea for Finn's history. Now there's a beginning of Finn's life that'll lead to more things in this story. Read and review! :-D