A/N: Hello, my kitties! I like to welcome my newest follower to this story, Indomiraptor. Hope you enjoy. And I'm also glad to say that I found a program with Spell/Grammar check, so that won't be a problem now. Anyway, let's get going!

Disclaimer: I don't own anything in the story.

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Chapter 10)Supercomputer

The three teens and four turtles stood at the entrance of the factory that they had once seen before, but only one remembers.

"See?" April said, "I TOLD you that there was a factory!"

"Sorry we didn't believe you, April," Donnie said. "I guess it's okay," April said. "Come on, let's get in there," Karai said. They saw her run into the factory, jump over the stairs and grab onto one of four ropes that hung from the ceiling that they hadn't noticed. "Uh, how did she know about those?" asked April. "Don't care, let's go!" Leo said. The turtles and Casey ran and jumped onto the ropes like Karai. April stood by herself, trying to think, she could feel there was something wrong with her friend.

They slid down the ropes and landed in front of a freight elevator. "Come on," Karai said, immediately walking into the elevator. "Whoa! Karai, where are you going?" Leo said, grabbing his sister's arm. "Leo, we don't have time for this," she said, "I have a feeling that there's something dangerous in there. Whatever it is, we have to take care of it before it destroys the world!"

They all looked at each other in contemplation. "I guess it couldn't hurt to just check," Donnie said. They piled into the elevator and Karai hit the button to go down.

The door opened and they all saw a large computer, sitting next to a three dimensional, holographic map, cut into four sections. "What is all this?" Raph asked, walking around and looking a the computer and map. "This must be the center of the anomalies that Donnie detected," Karai said. "Let me see," Donnie said. He walked over to the computer and got on it, "Incredible."

"What?" Mikey asked. "There's an entire digital world inside this computer. It's like an ecosystem made out of code!"

An alert with a red, tower-shaped object appeared on the screen. "What is that?" he asked. "It's probably some sort of alert that shows that this thing could case harm," said the snake-girl, slamming her hand on the keyboard, "We need to shut it down and destroy it immediately!"

"Okay, and how do you propose we do that?" Raph said, crossing his arms. "There's a mainframe a few floors below this room," she said, "We shut it down, then smash it. It's that easy."

"Okay, come on," Leo said. They got back in the elevator and, once again, Karai pressed the button to go down.

"Karai, how did you know all this?" April asked her.

"I did a little scoping out before I got you guys."

Once they got to the lower level of the factory, the door opened and they entered an empty, white room, but as soon as they entered a giant, cylindrical mainframe with two tiers, slowly emerged from the floor.

As they got closer, a panel with the same eye symbol, that only April recognized, opened and a handle popped out. "That must be the shut off switch," Donnie said. "Then what are we waiting for?" Karai said, "Let's just get this over with!"

Just as she said this, the symbol flashed in her eyes again, which April noticed. "X.A.N.A.," she whispered. She quickly scanned the room and spotted an old pipe off to the side. She quietly snuck over to it and picked it up without no one noticing. She came back over, hiding the pipe behind her back and stood behind Karai.

"April, what are you doing?" Mikey asked her. "Nothing," she said smoothly.

Karai walked toward the mainframe and reached for the handle. "NO!" April screamed as she ran to Karai and swung the pipe at her. The mutant easily dodge the attack. "April, what are you doing?!" Leo said. "Stopping her!" the kunoichi answered, trying another attack. "Why?" Casey asked, "Karai wasn't doing anything wrong!"

April continued to attack, until she finally got behind Karai and grabbed her, "Donnie! Tranq her!"

Donnie didn't understand, but pulled out a tranquilizer ball that he had been working on back in New York. He threw it at Karai, hitting her in the face.

The snake girl soon calmed down and went limp as she lost consciousness. April dropped her on the ground and breathed heavily. "What the heck was that?!" Raph asked. "Yeah, I've never seen Karai act like that, except when she was working for Shredder."

"That's because this isn't Karai," April said, "Casey, call Jeremie and tell him to get the others and come to this factory."

"Uh...okay," Casey said, quickly pulling out his phone. "We gotta tie her up before she comes to," April said. "On it!" Mikey said. He pulled out a roll of duct tape and wrapped up the girl.

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"I just have no idea who would want to do this," Jeremie said. "What if it's X.A.N.A.?" Yumi said, "Like when he trapped me in a Guardian and sent a clone to Earth and she destroyed your stuff."

"Maybe," Jeremie said, thinking. "Hey, look at this," Ulrich said, moving one of the smashed devices. He picked up a white scale off the floor. "Is that a scale?" William asked.

Just then, Jeremie's phone rang.

"Hello?" he answered, "What? How did you find it? Karai? Okay, okay, we'll be there in a few minutes." He hung up the phone and put it in his pocket. "I think It was Karai," he told them. "Karai?" they said in unison. "Yeah," he said, "She's been possessed and led them to the factory."

They ran out the door and ran to the boiler room to take the passage to the sewers.

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The Lyoko warriors came into the lab and saw April and Casey, standing alongside the four turtles, and Karai on the floor, unconscious and wrapped up with duct tape. "Whoa, cool!" Odd said, seeing the turtles. "What are you all doing here?" William asked. "Karai brought us here," said Donnie, who was still sitting at the computer, "What is this place?"

"Secret," Jeremie simply said, "Now get out of the chair before you ruin any of my work."

"Geez, I was only trying to help out," Donnie huffed. "Okay, get to the scanners and I'll send you to Lyoko," Jeremie said, "Let me just localize the tower." He pressed a few keys on the computer and it started a scan.

"Wait, you think it's a good idea to send us all to Lyoko?" Yumi said. "Yeah, I think someone should hang back, just in case Karai wakes up before Aelita can deactivate the tower," Ulrich agreed.

"It's okay," Raph said, "We're professional ninjas, we can handle whatever she throws at us."

"Yeah, maybe if you were dealing with the real Karai," Odd said, "But she's being controlled by X.A.N.A. A dangerous entity," Odd said. "Okay, Aelita, Odd, Yumi, and William will go," Jeremie said, "Ulrich will stay behind."

"Got it, captain," Odd said, giving a mock salute. He, Aelita, William, and Odd got back in the elevator and it closed behind them.

"Where exactly are they going?" Casey asked. "To Lyoko," Jeremie said. "What's that?" Mikey asked. "A virtual world, cut up into different sectors." He continued to type and then spoke into his headset, "You guys ready?"

Yumi, Aelita, and Odd got into the scanners and the scanners all shut, "Transfer Yumi, transfer Odd, transfer Aelita. Scanner. Virtualization."

Once they were out of the scanners, William stepped in again and Jeremie repeated the process.

The four landed in the middle of the desert sector. "Okay, the tower should be 18 degrees from your location"

"Got it," Aelita said. They took off toward the tower.

April looked over at Karai, still knocked out. Then she looked at over at Jeremie.

When he noticed her staring at him, he asked, "What?"

"You started the day over, didn't you?" she asked.

"H-how did you know about that?"

"Well, I wasn't sure what it was when it happened, but I remember being on the bridge outside and then I remember there being a bright light. Next thing I knew, I was back in our room," she explained, "So, spill it, what was that?"

Jeremie was about to start talking, but the computer started to beep. "Not now," he said, "Guys, there's some Bloks coming your way!"

April looked over at Karai again, "She was the one that destroyed you computer, wasn't she?"

"Karai? More than likely."

"Why'd she do something like that?" Raph asked. "Because, if I didn't have my equipment, we wouldn't have known that X.A.N.A., the one we're fighting, had launched an attack," he explained.

"Hey," Ulrich said, "Does this have anything to do with her?" He pulled out the scale that he had found in Jeremie's room. "Uh, yeah," Donnie said, "Karai is part snake."

"William, Look out!" Jeremie said into the headset.

"What's going on?" Casey asked. "William's just been attacked and devirtualized," the blond answered. "'Devirtualized?'" Mikey asked. "He just lost all of his life points and is being sent back here," Ulrich said.

After a few minutes, the elevator door opened and William stepped out. "Welcome back," Jeremie said. "I swear, I did not see that Blok coming up behind me," he said. "Blok?" Raph asked. "Don't worry about it," William said.

"Release me! Now!" Karai hissed in a distorted voice. They all looked down and saw that she was awake and struggling to get free. "Nice try, X.A.N.A., but we're not falling for that," Casey said. "Guys, look in my eyes," she said in her normal voice, looking up at them.

They looked at her and saw that her pupils were normal. "Will you please let me go?" she pleaded. "Okay," Mikey said. He took a step toward her, until Ulrich grabbed the top of his shell, "Mikey, no!"

He was pulled back just as Karai change into her snake form and tried to attack him. "Whoa!" Casey exclaimed. "What is she?" William asked. "She's a mutant, like us," Leo said, struggling with her, "Donnie!" Donnie reacted by hitting her with another tranquilizer ball, knocking her out again.

"Well, that's makes a lot more sense," Ulrich said as Leo laid Karai on the ground. Something suddenly hit Mikey, "Hey, how did you know my name?"

"Huh?" Ulrich said. "Just now, when you pulled me away from Karai, you said my name," Mike replied. "Well, I don't think you'd understand if we explain it to you," Jeremie said.

"Uh, hey, Einstein?" Odd said on the computer.

"What's wrong, Odd?"

"Well, our old friend has a line of Tarantulas and Krabs set up in front of the tower and we can't get past them!" Yumi said, "We could use a little leverage."

"Got it, vehicles coming right up." He entered a few codes and they showed up in front of them, which they jumped onto without a second thought and flew over the monster, taking out a few in the process.

"Okay, this should all be over in a minute or two," Jeremie told the others in the room. "That's good," Donnie said, "Because I'm not sure how effective the tranquilizer will be this time."

A tarantula fired a laser and hit Yumi in the chest, devirtualizing her.

"Okay, Odd, it's up to you," Jeremie said. "Too easy," Odd said, flying over the others and dropping Aelita off at the foot of the tower. She ran in and began the process.

"Okay, she's in," Jeremie said, "Won't be long now."

Karai suddenly jumped awake, mutated herself again and ripped the tape that restrained her. She ran to William first and tightly grabbed his arms so he couldn't get away. She bared her fangs and him and leaned forward, prepared to bite.

The dark aura suddenly left her body and she shifted back to her human form. William put out his arms and caught her as she went limp.

"Is she okay?" Raph asked, the six New Yorkers gathering around her. "She'll be fine," Jeremie said, turning back to the computer.

A few seconds later, Karai opened her eyes and looked up at William. She blushed as he let her go. "W-what happened?" she asked. "Apparently, something attacked April earlier and I think it took control of you when it couldn't do it to her," Donnie said, "Did I get that right, uh..."

"Jeremie," he said, typing on his computer, "And yes, that's right."

"Jeremie, what are you doing?" April said. "I'm setting up to go back in time," he replied, "That way, no of you will remember any of this," he kept typing and went to press the final key, "Return to the past, n-"

"Wait!" April said, grabbing his arm. "What?" he said.

"We want to help."

"Are you sure? It's pretty dangerous," Ulrich said. "Hey, we went up against alien robots, homicidal mutants, and the man that killed our father!" Leo said. "Whoa! What?" Odd said, "It's hard to explain," Karai said, casting her gaze to the side. "Well, how about we make a promise," Jeremie said, "We have to do a jump back in time, but if you by chance remember this, we'll explain everything and you can join our team?"

"Deal," April said. "Okay, in that case, return to the past now," Jeremie said. He hit a few more keys on the keyboard and the same white orb that April remembered appeared in the middle of the room, expanding and engulfing them all once more.

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A/N: Thanks for reading and I want to let you all to know that I'm going to start a sequel to my other fanfictions, Of Gems and Mutants, which shouldn't be a too long story, but will be at least a few chapters long, but I will still be working on this one. So just remember to read, review, and share, and I'll see you in the next chapter! MEOW!

-Kittenclysm