So I had this idea since a few years before. And after sorting out some problems I think this story is ready for this fanbase. Emphasis on think

Chapter One

Different World

The black haired man stared at the child before him with a grin on his face. He clutched the whip again and thrashed it against the boy with more force, relentlessly slapping the exposed kid's bare skin. Tears welled up in his eyes, and his lips were pursed. But he did not scream, did not beg, did not call for help.

Because he knew it was all hopeless.

After all, it had been 16 years. And no one was going to save him.

"You failed again." Another slap of the whip

"You disappoint me." Leather flashed, skin bruised.

"You disappoint everyone." Blood now caked the brown of the whip. The man stopped, thought for a moment then nodded.

"You are grounded, five days, you can leave your room only to go to the bathroom. Food and water will be given three times a day. Do you understand?"

The boy nodded.

His step father turned and walked out of the room, locking the door behind him. Seconds passed and the kid shifted, moving to a cupboard to take out a first aid kit. He began dressing his wounds, covering the bleeding areas with bandages and rubbing cheap lotion on the bruises, since he had no idea what was used for major bruises.

Mark wiped his tears away and put the first aid kit away. He sat on the cold bare floor for a minute, his arms wrapped around his scarred and bruised body.

He failed again. By now he knew that nothing would stop his step father's wrath. His father was a strict man and hated failure. But that was all Mark was, a failure.

From time to time Mark wanted to run away, to escape the abuse inflicted upon his soul. He could be free, but where would he go to? He had no friends, no siblings or any other family members except his father.

And the authorities won't believe him. His father had hidden his tracks too good, no one could see that he was hurting his own child.

So Mark was just silent, keeping all his opinions and wants tucked deep within his mind. His bare room with a cupboard, one mattress and a desk showed that much.

Mark glanced at the time on the broken clock. 12:54 at night. A smile graced his features and he stood up. He rummaged around the back of the cupboard and took out a pair of gloves and shoes. He set them aside and dived back in, this time returning with a black tracksuit and a black hoodie.

He wore his pyjamas and then wore the hoodie over it, along with his tracksuit. Mark the wore his prized possessions; his Onitsuka Tiger Ultimate 8.1 parkour shoes and his Black Diamond Crag Half Finger gloves.

They were passed down by his REAL parents and he made it his mission to learn Parkour, since his parents were both into parkour.

His window was nailed shut and barred, adding to the feeling of being held prisoner.

But Mark went over to the window and crouched down, taking off a wooden plank and revealing a small gap between the plank and cement. Before he left, he went over to the cracked mirror and checked his reflection. Mark smoothed his black hair and looked at his excited blue eyes.

This was the only thing in his entire life that he truly loved.

Parkour.

The teen slipped into the gap and replaced the wooden plank in its original position before crawling his way towards the general direction of the building's exterior. Soon cracks of light could be seen and the teen reached out and pushed against the loose bricks, making them tumble out onto the other side.

Mark slowly lowered himself to the roof of the next building, being careful not to cut himself on any sharp objects lying around.

Mark was greeted by the city of New York. Even as a kid he favoured New York above all, and not just because of the parkour sites availible, but because it was his parents' birth city.

Although, tonight he would have to be home before 2, his father will probably check on him then.

Mark turned and made sure the bricks were well hidden before running off, searching for a site.

[-]

"Yo Leo! You ready bro?" The turtle in question grabbed his katana from the stand and put the on the back of his shell. The blue clad leader turned and walked out of the dojo, seeing his brothers were already at the lair's entrance.

"Lets roll." Leonardo said simply. The four turned and exited the lair for their evening patrol.

[-]

Mark back flipped onto the next rooftop with surprising agility for someone that lacked muscle power. He continued his adrenaline rush, doing a screwdriver over an AC unit and swinging around pipes. The onyx teen stopped to breathe only when he couldn't continue any further. Sweat had formed on his brow and it was getting stuffy in the hoodie.

Mark cursed when he realized he forgot to take his bag with him. Meaning no water or a snack. The teenager sighed. "Nice going Mark," He chided himself. "you really are just a disappointment."

The boy was pulled out of his dark thoughts when he heard yelling in the distance. Mark was confused. The sounds weren't coming from the streets, no, rather it seemed to be coming from the rooftops.

Curios to find out the sources the black clad teen followed the noises.

[-]

Donatello sighed. He really couldn't understand why his brothers were already arguing five minutes into the patrol. Mikey had said something or other to Raph who didn't take it too kindly and now was trying to murder the orange clad turtled. Leo on the other hand was trying (and failing he might add) to stop the two.

Donnie won't be surprised if the Purple Dragons or even the Foot were on their way now.

Donnie stiffened when he felt a presence other than themselves. He looked around, years of ninjutsu training being put to use as he took stock of their surrondings once more. "Guys." He whispered. They didn't hear him. "GUYS!" He yelled. They stopped in the middle of whatever they were doing. "What?!" Raph asked harshly. "Someone's here." Donnie stated as he spotted a flash of black clothing. "There!"

The foursome chased after the stranger in the hoodie.

[-]

Mark had heard tales of mutant turtles living in New York but he, like most other level headed people didn't buy it.

Now he was pondering whether or not he should change his mind.

Four mutant turtles were pursuing him, and if it hadn't been for the fact that they had weapons OR the fact that they were mutants he would've laughed at his situation.

But as it were they had weapons and were mutants.

Happy day.

Mark put all of his parkour training to use as he forced himself to run faster.

[-]

"Whoa dudes, the mystery guy got mad skills!" Mikey exclaimed. Leo agreed with his younger brother. The yet-to-be-confirmed enemy was scaling walls and jumping rooftops with practiced and amazing flexibility. But the foursome knew the city by heart, and add that to their ninja training. They were able to keep up with him quite easily.

Raph threw a shuriken which embedded itself in front of the man's face. The man turned and flipped off of the roof, landing in a roll on the streets with barely a scratch. "The guy definitely has mad skills." Mikey commented before jumping off with the others. "We can't let him escape," Leo ordered. "Raph, Mikey cut him off, Me and Donnie will follow him." Raph and Mikey took a different path, as ordered.

Donnie and Leo followed.

[-]

Mark saw the red and orange masked turtles were gone and the blue and purple ones were chasing him still. Mark knew what that meant.

His breathing was quick and short and his heart was beating fast, but with the last amount of energy left in his veins, he turned and went into an alleyway, wall jumping between the two buildings and climbing up. He ran faster and finally stopped, hiding behind a brick chimney.

He wiped his brown and one hand clutched his chest, trying to still his fast beating heart. He leaned against the brick and tried to clear the spots in his vision due to less oxygen reaching his brain.

A shuriken embedded next to his head and he gasped. He made to get up but he was already surronded. The blue one took one of his swords and pointed them at him. "You have been surrounded, stand down." Mark knew that he could no longer run any more so he raised both his hands above his head and stated. "I-I don't want any trouble."

But he just got himself into a world of trouble.