Disclaimer: I do not own or make money on TMNT.

Teenage Mutant Ninja Turtles
Without a Trace

One year ago.

Sometimes doing more then one thing at a time just wasn't a good idea. This was one of those times. Michelangelo skidded around a turn in the sewers on his skateboard, desperately trying to keep a hold of the stack of pizzas he was carrying and trying to talk into the shell cell at the same time.

"Don, this definitely isn't a good time, Ill be back at the lair in a few minutes you can tell me then." .

Concentrating on keeping hold of the sliding pizzas he didn't see the crack in the ground till his skateboard suddenly stopped. Only problem was... He didn't stop. There was a strangled curse, as the turtle went sailing through the air. As he did the pizzas and shell cell also went flying. Using his ninja training he was able to twist and land on his feet, and catch the flying food. Straightening up shakily, he looked around for the shell cell. His heart sank as he watched it teeter on the edge of the crack in the floor. Nearly dropping the food he made a grab for the cell phone when it slipped.

He tried sticking his arm down the crack but it was to small an opening for him to get into. There was no getting the shell cell back. He gulped. Donnie would have his shell when he returned.

Present Day.

The Sun hovered on the horizon, struggling to reclaim its grasp on the sky. But as always it was a losing battle. With a final brilliant splash of color the sun gave up its fight and sank below the horizon. As darkness claimed victory and spread itself across the world, creatures that only move at night began to emerge from hiding. Only the stars that twinkled above bore witness to what went on once the suns light had been extinguished.

In the shadows four shapes moved hurriedly from rooftop to rooftop. As they gracefully leapt and flipped and swung from one shadow to another. Blending in with their surroundings it was hard to tell the were there at all. Until one of the shadows tripped as it was leaping towards another ledge. The darkness was filled with soft laughter as the other three shadows converged on their fallen comrade.

"It wasn't that funny you know." Mikey grumbled as his brothers helped him to his feet.

"Are ya kiddin Mikey? It was hilarious watching ya flip like that." Raphs deep voice still shook slightly with laughter.

Deciding to change topics and keep a fight from brewing, Leo spoke up. "How about a game of ninja tag? Me and Mikey against Raph and Don?"

Three nods came quickly and Raph and Don took off. Leo watched as the other team vanished quickly from sight. "Think that's enough of a headstart?"

"Yeah lets go." Mikey took off at a dead run with Leo right on his heals. He was a little ahead of Leo when he felt his foot sink a little further into the roof of the building below him. Skidding to a halt, he turned to warn his brother to watch out for the weak spots. The words never left his mouth as a bright blue light washed over him. There was a sudden crack that sounded like thunder, then pain washed through his body. He felt the brief sensation of falling, then blackness consumed him.

Leonardo winced as a flash of light nearly blinded him. Blinking several times, he was horrified to find that there was no sign of his youngest brother. Running to search the roof, he nearly tripped over something laying on the roof. Kneeling he picked up a set of nunchucks. Whatever had happened to Mikey, he didn't have his weapons. Tucking them in his belt he stood and reached for his shell cell.

"Don, Raph come in, we have trouble." It only took a few seconds for the rest of his brothers to arrive, but by that time he had been over the whole roof and had found nothing.

"Your saying he just disappeared?" Raphael growled.

"One minute he was there, the next gone. Lets check out the inside of the building." Leos voice while steady and strong still held the worry he felt.

The three brothers searched the entire night. Not leaving anything unturned. The sun fighting its way above the horizon finally forced them to give u their search and return to the sewers.

The following weeks would be spent with the three remaining brothers, their sensei and their human friends utilizing every option they had. But in the end they had to admit defeat. There were no leads. No trace of anything. Their brother had simply vanished.

There were theories of course. But none that could be proved. Each brother faced his own demons. Leonardo blamed himself, though both Raph and Don had said there was nothing he could have done. Donatello worked himself fiercely, using his way with technology to try an explain where his brother had went. And Raph... Raphael handled it the way he usually handled these things. His anger threatened to overwhelm him.

Elsewhere.

"What the shell happened? Mikey groaned and shook his head as he sat up. Bad Idea. Pain exploded in his head. Gasping he sat back against the wall and tried to take stock of where he was. Running his hand over his belt, he felt for his shell cell and weapons. Both were gone. He couldn't help but think. Great Donnies going to kill me. Hearing a noise he was instantly on his feet and backing against the wall, fading into he shadowy corner.

A door opened and an object was tossed roughly into the room. He vaulted for the door but wasn't fast enough, reaching it, he heard what sounded like heavy bars sliding into place. Turning he made his way to the bundle that had been thrown in. His eyes widened as he realized it was a girl. No older then himself from the look of it. He was even more startled when he noticed she had cats ears and a cats tail. He was taken off guard when she suddenly launched herself off the floor and darted away from him, pressing into the shadows much as he had done not to long before.

"Its ok, im not going to hurt you." Mikey held his arms away from his body, trying to show he wasn't armed. The human-cat merely watched him. "Do you know where we are? What's your name? Mines Michelangelo" More silence. Fine. He turned away from her and searched the room. Looking for other ways out and also for his lost equipotent. He was aware of the mutants eyes following his every step.

Eventually giving up, he moved to sit crosslegged on the floor. The voice when it came was so soft he almost missed it.

"My name is Kat"

Authors Note: I realise cat mutants have been done before, but what can i say? I love cats and she suits for what will be coming. Hope you enjoy this new story. Mikey isnt my favorite turtle, but i could totally see this happening to him.