It was getting late by the time they all landed back in the tree house. As soon as they arrived, Numbuh 1 clicked his heels together, triggering the miniature rockets in his shoes and blasted off, travelling to the higher levels of the base. Jacey whistled in admiration, she'd always wanted a pair of those, but had never had the chance. No matter, she'd soon figure it out, with practice.

"That was so cool the way you kicked that guys butt!" Numbuh 3 giggled.

"Looks like that vampire better work on his bite!" Numbuh 2 added, his joke falling flat.

"It was you guys that did all the work!" Nikki mumbled, blushing, "Where's Nigel going?"

"Numbuh 1 always gives an update to HQ after every mission." Numbuh 5 explained.

Jacey pricked up her ears in interest, "Mind if I go up and see him?"

"Sure, As long as you don't trouble him. You can use my key-card to get in." Numbuh 2 offered.

"Thanks," She chucked her bag on the sofa before making her way up the endless flights of stairs until she found the right room. It was filled with computer monitors and surveillance equipment. She could hear her sister talking inside. She tiptoed inside and saw him looking up at a large screen with a stern looking, blond haired girl with what looked like a sieve for a helmet. On his helmet was the number 362. Jacey guess that she might be someone very high up in the KND.

Numbuh 362 glared at her over Nigel's shoulder, "Numbuh 1, teenager attack!"

Numbuh 1 span around, fists raised, he groaned as he set eyes on Jacey, "No, Numbuh 362, She's just my sister and Numbuh 4's babysitter."

"You don't say?"

"Hi....Just love what you've done with the clubhouse" Jacey said, waving at her with a friendly shy smile. Numbuh 362 stared at the girl with thought, 'That girl....she looks familiar, where have I seen her?'  before  pushing her mind aside.

"May I remind you that no teenagers allowed?!"

"I know.... But she means no harm and she'll be leaving later."

"Right.....Anyway, Numbuh 1, remember what I said about planning and taking time to think things through, you're getting careless again."

"Yes Sir!" Numbuh 1 grumbled, giving a salute.

Jacey wondered if calling that girl a 'Sir' was the best option, but ignored it. He turned to her, glaring at her from behind his shades and stormed out of the room, not looking back. Jacey felt a pang of hurt in her chest, had she done something wrong? 

Her thoughts were evaporated by a flashing light coming from her jeans pocket. She narrowed her eyes in confusion, as she produced a round, flat device. Strange, she didn't remember having this thing on her, what was it anyway? Her curiosity got the better of her and she pressed a tiny red button in the center of it.

Out of the button, appeared a beam of light that grew into a hologram. An uncomfortably familiar logo flashed before her, she gulped and slowly closed the door of the computer room. The logo was replaced by a written message:

Plug this device into any computer drive... or else!

She didn't want to find out what the 'or else' part means, she looked around as  slotted the device into the monitor in front of her. It demanded a pass card. Unsure how to use the computer then she remembered the card that Numbuh 2 had given her. She silently thanked him again and scanned the card, sighing with satisfaction at the green access label. She waited with bated breath while the device was downloaded into the computer. Soon, the screen was filled with the image of a teenage girl with curly dark hair and a cruel smirk.

"Cree?!" Jacey said surprised.

"Hello partner, how's it going?" Cree smirked.

She groaned with annoyance, "If it's about becoming part of your crew, you should forget it, I already made up my mind."

Cree shrugged, "Oh come on, a girl can't have a catch up with her fellow Teen Ninja?"

"I'm not part of your club! I never was! Sheesh, I told you before that I chose this. Now, what is it you want!"

Back in the centre of the tree house, Numbuh 1 returned to his team, muttering in anger to himself. The nerve of her, barging in while he was in the middle of an important transmission and embarrassing him like that! 

Rachel probably thought he was such an idiot now. Wait, what was he thinking, Numbuh 362, not Rachel, and it was his reputation he was worried about, not personal relations! He found himself reddening, but brushed it off by forcefully shoving his shades back up his nose. He angry stormed past his teammates and threw himself on the sofa, accidently knocking over the bag that Jacey had left there. Its contents spilled out onto the floor.

"What the heck?" Numbuh 4 snapped, picking up one of the devices.

They all bore the same logo, everyone crowded around, examining the advanced weaponry and technology. They recognized a few bits and pieces, some of them had been used against them in the past. They noticed that it contained mostly miniature cameras, what were all of these doing in Jacey's bag?

"Numbuh 5 knows where these came from..." Numbuh 5 growled, tweaking her cap.

"Uh, guys, you may want to take a look at this!" Numbuh 2 called from his computer monitor.

A red warning symbol flashed as they gathered around him. Warning: Intruding Signal Being Broadcast! They exchanged glances as the computer began tracking the source of the broadcast. They were shocked to find that it was coming from inside the base, Numbuh 2 brought up the security camera from the broadcasting room where Numbuh 1 had just left. The camera showed Jacey, looking either angry or determined, maybe both, at the screen in front of her.

"How is she able to access that?" Numbuh 1 snapped, throwing his arms in the air.

Everyone looked at Numbuh 2 who chuckled nervously, "Uh... I gave her my card..."

"What? Why did you -"

"Wait, who's she talking to?" Numbuh 3 asked, pointing towards the digital figure that Nikki was talking to.

Numbuh 5 hunched her shoulders and narrowed her eyes, "Cree."

"Listen!" Numbuh 4 demanded, leaning in closer.

Cree had just said something, looking down on Jacey with a mixture of pride and anger, Jacey narrowed her eyes, raising her voice.

"I told you before that I chose this. Now, what is it you want!"

Cree smirked, "Just to say good job on infiltrating the Sector V's base and I look forward to viewing their plans through those cameras you're planting. Oh, and thanks for installing this program, we should be finishing their system download anytime now. See you soon, partner!"

She seemed to be talking with urgency, not giving Jacey a chance to speak. Cree pressed a button and the children's screen went black. They all looked at one another in horror. They were all thinking the same thing, Jacey....his big sister... was actually Teen Ninja spy! Numbuh 4 jumped up and grabbed his sling-shot, loaded the marble ready.

"Let's get this cruddy scum!"

Meanwhile, Jacey watched as Cree pressed a button on her end, but nothing seemed to happen, yet Cree continued to look pleased with herself. 'What was that all about?'

"Woah....Woah... What are you talking about? I never did anything of the sort? I'm not your partner and I would never do something like that, you know that!"

Cree, covered her mouth in mock shock, "Whoops, looks like I've made a mistake, ah well, see you around!"

The screen faded to black. Jacey's head was buzzing with confusion, 'what the heck was going on?'

 She wasn't sure if that message should have been threatening or praise, but it didn't matter, clearly Cree was on some sort of new experiment that made her act more crazed than usual. Jacey shook her head and turned around to see the doors of the room snap open, revealing the team, loaded with weapons aiming at her. She backed away instinctively.

"Woah... Guys, What's going on?!"

"Why don't you tell us, Big sister?" Numbuh 1 emphasized the last word like it was painful.

Numbuh 3 glared at her with a child-like pout and tossed Jacey's backpack forward on the floor, letting the spy gear and equipment pour out onto the floor. Jacey took a step back, what the heck was all of that doing in her bag? It wasn't hers, she'd never seen it before! She looked pleadingly up at the team.

"What's this?! That's not mine!" she declared.

"Yeah, and Cree isn't your partner." Numbuh 5  said sarcastically.

"What? No, she isn't! Wait..." Jacey looked behind her at the blank screen, she understood now, "No way, that transmission.....! She set me up! I'm not with her I swear, I'd never do something to you guys!"

"I likely story!" Numbuh 4 snapped, launching his weapon and releasing a net that wrapped around Jacey's body tightly, causing her to fall to the floor.

"Please! You have to believe me!"

"Why, because 'lying isn't your thing'? How dumb do you think we are?" Numbuh 2 asked.

"I swear, it's a set up!"

She couldn't move, her heart pounded, why weren't they believing her? She was telling the truth! She continued to beg and plead as they dragged her out into the open air. Numbuh 2 was contacting the KND security, informing them of her treachery and ordering a prison unit to pick her up. 

After everything she'd worked for, the trust she tried to gain, it was all over. She looked pleadingly at her little brother. He looked down on her with distain, turning his back on her. That was when she stopped fighting... when she finally realized that her own flesh and blood no longer trusted her. It killed her inside. If he didn't believe her, then what was the point in fighting any more?

'I know I didn't want to come to this.' She thought sadly. 'I swear myself not to do this but no choice.'

They waited until the security craft zoomed into view. The team loaded Jacey into the back and locked the doors, congratulating the team before taking off out of sight. Once inside the tree-house again, Numbuh 1 refused to talk, instead he went straight to his room. He lay on the bed and stared at the ceiling, feeling a mixture of satisfaction and hurt in the pit of his stomach.

 Part of him believed that Jacey was telling the truth, she's seemed to upset, but then again, her mission had been foiled, of course she was upset! No, he ordered himself, she was a traitor and now she's going to be out of your life. No more in her shadow, you're the best now. Not her.

"Numbuh 1!"

He jumped up at the shrill cry and leapt into action. His communication device on his wrist flashed, revealing the image of Numbuh 362. She looked grim and focussed.

"We've got a problem. Your sister escaped."

"What? How?" he demanded, gathering the attention of his teammates from outside.

"Her crew of Teen Ninjas attacked, we weren't ready and they took her with them. But we've manage to place a hidden tracker on her which should tracked their current location. We need you to retrieve her along with any other enemies you can get. But she is a priority."

"Where is she?" he snarled, narrowing his eyes.

The screen morphed into a map, revealing the coordinates of his sister, his jaw clenched in anger. He nodded and ended the transmission. The rest of the team looked at him eagerly.

"Kids Next Door, battle stations!" he cried, "We're going to pay a visit, down the lane..."