YAY! My first TMNT fic! It is based on a famous story, but I'm not going to tell you what story it is. You have to guess for yourselves.

I have to warn you, there will be some character deaths, but I'm not telling ya who's gonna get it.

Before I start, I hafta say that I have not seen a single LeoKarai fic in all of I can't be the only one to have thought of this, so if you have seen or authored another LeoKarai fic, please tell me.

(I do not own TMNT or the story this was based on.)


As Donny was watching the news something caught his attention.

"Hey guys," He called. "Come here. There's something on the news you should see."

Mikey, Leo, and Raph walked in, followed by Splinter.

"What is it Donatello?" Splinter asked.

"Take a look." Donny replied.

He turned up the volume so they could all hear what the reporter was saying. "Oroku Saki will be holding a costume party at his home this Friday to celebrate Halloween. The guests include the mayor, the chief of police, and their families."

"So the Shredder's havin' a Halloween party," Said Raph. "So what?"

"He's having it at his home Raph." Donny replied. "Which means, if someone wanted to find out what Shredder was planning on doing with all that alien technology…"

"Then all they'd need is a costume!" Mikey finished.

"I think you may have something there guys." Leo commented. "If we could sneak into the Shredder's place and see what he's doing with the alien tech he's been salvaging, we might be able to figure out a way to stop him."

"No." Said Splinter sternly. "It is too dangerous. I cannot allow you to-"

"But Sensei," Mikey interrupted. "We'd be in costume. We would blend into the crowd for once."

"Mikey has a point." Donny added. "The one place Shredder and his goons would ever look for us is in plain sight. And besides, there'll be too many people there the Foot to attack us."

"I'm with them," Said Raph. "This could be our chance to see what that walkin' cheese-grater is up to!"

Splinter still seemed unsure. But then, Leo spoke up. "Please Sensei; this is something we have to do. We'll be careful, I promise."

Splinter thought it over for a moment, and then made a decision. "Very well my sons. But remember, you are only there to find out what the Shredder is planning. Starting a fight will only put you in more danger."

"Don't worry Master Splinter, we'll be careful." Leo reassured.

"Alright!" Mikey shouted enthusiastically. "We're going to a party!"

Meanwhile, at the Shredder's evil lair, all of the Shredder's top lackeys had been assembled.

"I wonder why we're here." The young doctor thought out-loud.

"I'm not sure." Dr. Stockman replied in an annoyed tone. "But whatever it is, it's a waste of my time and genius!"

"Shut up!" Hun grumbled. "If the Shredder wanted to see us, then he will see us!"

Karai stood in silence, awaiting her master.

Oroku Saki soon walked in, followed by a young man in a long white coat.

Karai and the others stood at attention as their master addressed them. "I have called you all here to introduce our newest member, Scorpio." The man in the long white coat stepped up. He had medium length brown hair, dark-green eyes, and a scar on the right side of his face. A fierce dragon emblem was embroidered on the back of his coat. "Scorpio has recently arrived from Japan. He was once one of the most feared yakuza assassins in all of Tokyo, but now he has decided to swear allegiance to me."

"I would be a fool not to serve you Master Saki." Scorpio added.

"So," Said Stockman. "We have a new guy huh? Well, what can he do?"

Karai looked at Scorpio, unsure of whether or not she could trust him. "I too would like to know what skills he possesses."

"Why don't we have a little match so you can see for yourself?" Said Scorpio confidently.

"Very well then." Karai drew her sword, as did Scorpio.

Karai swiftly charged at Scorpio, only to have him block her attack. He then launched an attack of his own, bringing his sword down with one hand, and unsheathing another sword in the other. Karai blocked the first sword and dodged the other, but unknowingly left herself open for a kick which sent her across the room. She regained her footing in time to raise her blade against Scorpio's, but her sword was broken and Scorpio was able to position his blades on either side of Karai's neck.

"You fought pretty well." Scorpio complemented as he moved his swords away from Karai's neck and re-sheathed them. "I guess there's more to you than just good looks."

Karai gave Scorpio an angry look. She was embarrassed to have been beaten by a newcomer.

"Well done." Said Saki. "I can see I made the right decision when I brought you here. Now, if you will excuse me, I must prepare for the costume-party tomorrow night."

They all bowed and left the room. In the hall Scorpio caught up to Karai.

"Hey," He called. "I hear there's gonna be a big party tomorrow. What say we go together? You know, on a date. What do you say Cutie?"

Karai had tried to ignore him, but she couldn't take any more. "First of all, do not call me 'cutie', second of all, we may be working together to serve master Shredder, but that does not mean I have to act friendly towards you. In fact, I would appreciate it if you would refrain from speaking to me unless absolutely necessary."

With that, she walked away. And Scorpio just chuckled.

The next day, Casey and April arrived at the lair with the costumes the guys had requested.

"Are you guys sure about this?" April asked, as Mikey tried on his clown wig. "It seems dangerous."

"Of course it's dangerous," Said Raph, who was looking at his knight costume. "But it's somethin' we gotta do."

"Don't worry April," Said Donny, who had received an astronaut suit. "With these costumes, no one will recognize us."

"Well, maybe you're right." April admitted.

"Of course they're right!" Casey added. "Why would the Shredder ever think o' lookin' fer 'em in plain sight? Right Leo?" Leo wasn't around to answer. "Hey, where is he? Doesn't he wanna try on his costume?"

"I believe Leonardo is on the roof of the warehouse, preparing for tonight." Splinter explained.

Leo was on the roof. He was wondering if this was a good idea after all. They would be wearing disguises, but the Shredder was no fool. And besides that, what if something went wrong? They would be virtually trapped within the Shredder's fortress. Perhaps it wasn't a good Idea.

But no, Leo knew that this had to be done… no matter what.

Leo made up his mind and returned to the lair. Tonight, he was going to crash Shredder's party!


Okay, I know this was a crappy first chapter, but things will get better next time. See you then, and be sure to review!

p.s. Does anyone know the name of that younger scientist that works for the Shredder? I forgot.