A/N Alrighty then folks here's the deal. This story is my first TMNT story so bare with me. I've written stories before but not for TMNT so if anyone seams out of character please tell me. Ok here's the primes of this story. I've seen stories about Leonardo being Shredder's son and I've read the IDW comics "City Fall" where Leo is Dark Leo. This gave me an idea. What if instead of Leo being Shredder's son it was another one of the turtles that was his son? Well that's the idea for this story. So needless to say it's AU and this takes place with the 2012 turtles and before Karai finds out she's Splinter's daughter. BTW I hate the new version's idea of Donnie crushing on April so there will be no April/Donnie in this. Maybe some April/Casey and Leo/Karai though. Ok that being said here's the first chapter of my story "Forgotten Past" oh and just for a disclaimer I don't own TMNT or it's characters. Enjoy ch 1.

Forgotten Past

Ch 1 A Horrible Accident

"Ha ha ha can't get me Raph," a five year Michelangelo called out as he raced around their sewer lair home.

"Mikey I'm gonna pound ya!" five year old Raphael shouted his green eyes flashing with rage as he tore after his brother.

"Mikey you and Raph had better quit it," five year old Leonardo said trying to prevent his brothers from fighting.

"Ah I don't have ta listen to you Leo," Michelangelo said sticking his tongue out.

"Well maybe I outa get Daddy out here then," Leonardo said with his hands on his hips.

"Oohh look Leo's gonna be a big ol' tattletale," Raphael said in a sing song voice.

"Tattletale tattletale hanging by a monkey's tail," Michelangelo sang doing circles around Leonardo.

"Hey keep it down," Donatello said sticking his head out from his lab. "I'm trying to work here!"

"Ah shut up nerd boy," Raphael growled smacking Donatello in the head.

"Hey!" Donatello protested rubbing his head. "Quit it Raph!"

"Make me baby," Raphael said smacking Donatello once again.

"Raphael!" a stern voice cried out. Raphael flinched and let out a groan knowing right away who the voice belonged to. The young turtle turned and saw his father and sensei, Splinter standing there not looking very happy. "Raphael," Splinter said in a calmer voice. "Come with me."

"Ah man," Raphael moaned, knowing full well he was about to get a lecture.

"Ha ha Raph got in twouble," Michelangelo teased.

"Michelangelo!" Splinter called out. "You come too."

"But Daddy..." Michelangelo began.

"Now Michelangelo!" Splinter commanded.

"Okay," Michelangelo groaned as he followed his brother to Splinter's room.

"Finally," Donatello grumbled rolling his brown eyes. "Maybe now I can get some work done."

"What cha working on anyways Donnie?" Leonardo asked walking into Donatello's lab.

"Just trying to get the flux compastor to work on the TV," Donatello said.

"The who and what?" Leonardo asked scratching his head in confusion.

"Just trying to get the TV to turn on," Donatello explained with a smile.

"You're so weird Donnie," Leonardo said with a smile gently rubbing Donatello's head. Donatello smiled at his older brother showing the gap in his front teeth. "Hey you wanna play some video games since Mikey and Raph are in twouble?" Leonardo asked.

"Leo we can't play video games with no TV silly," Donatello said with a giggle.

"Oh yeah," Leonardo said with a laugh. "I forgot. Can I help?"

"Sure!" Donatello said his brown eyes lighting up he was always eager to spend some time with Leonardo. With that the two brothers began to work.

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Meanwhile Splinter was having a serious conversation with Raphael and Michelangelo. "My sons," the wise rat began. "I know you are both very young but you must understand the consequences of your actions."

"Yes Masta Splinta," Raphael and Michelangelo said together.

"Raphael you must learn to control your temper," Splinter said. "And Michelangelo you must learn not to pester your brothers so much."

"Hai Sensei," the boys said together.

"As punishment I'm going to have to ground both of you," Splinter said. "You are both confined to your rooms for the next two day. No comic books. No video games. Perhaps this will give you both some time to meditate on what you can do to change your behaviors."

"But that's not fair!" Michelangelo cried out.

"Michelangelo do you want me to make it four days?" Splinter said giving his youngest son a look.

"No," Michelangelo mumbled. "But.."

"No buts," Splinter said firmly. "Go to your rooms. Now. I will bring you your supper when it is time."

"Man," Michelangelo muttered. "Thanks a lot Raph. You got me in twouble."

"Na uh," Raphael said. "You did it yourself Mikey."

"If you weren't such a meany sticky poopy head this wouldn't have happened," Michelangelo said narrowing his blue eyes at his brother.

"I wouldn't be so mean if you wouldn't be such a pest!" Raphael growled his green eyes fiery.

"Boys!" Splinter shouted causing both turtles to jump slightly. "That is quite enough! To your rooms! Now!"

"Yes Daddy," the boys said together. Giving each other one final glare the orange masked turtle and his red masked brother went to their rooms.

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The next two days were very quite around the lair. Michelangelo and Raphael remained in their rooms only allowed to come out to us the bathroom. Leonardo and Donatello were enjoying the quite and Donatello was able to fix the TV with Leonardo's help. Now Raphael and Michelangelo were allowed to be out of their rooms. "Can we go out sewer skating Daddy please?" Michelangelo begged giving Splinter his cutest look.

"Yeah please Daddy," Donatello begged. Splinter looked at his four sons, who were all giving his pleading looks. Then the brown coated rat sighed. He knew it had been raining heavily for the past week and the sewer waters were very high and rough.

"I am sorry my sons," Splinter said. "But the waters are to dangerous."

"But we'll be real careful Daddy," Raphael said.

"Yeah we promise," Leonardo chimed in.

"I am sorry boys but the answer is no," Splinter said. "You four do not know how to swim yet and anything could happen."

"Aw man," the four brothers grumbled, clearly disappointed.

"Perhaps in a couple of days you may go out," Splinter said. "But for now it is best you stay here. Now I am going to meditate now. Please keep the noise to a minimum." With that Splinter took his leave.

"Man this sucks," Raphael said kicking a piece of paper across the room.

"Yeah tell me about it," Michelangelo grumbled flopping down on the couch.

"Hey we could play video games," Donatello suggested.

"Awesome!" Michelangelo cried his blue eyes lighting up. "Me and Raph get first."

"Na uh," Donatello said. "It was my idea so I say me and Leo get first."

"Well I say your wrong nerd boy," Raphael said snatching the controller from his younger brother. "Come on Mikey let's play."

"Hey!" Donatello said, his bottom lip quivering slightly. "I'm gonna tell Daddy you're being mean Raph."

"Oh no you don't," Raphael said jumping off the couch. Donatello began to run and Raphael chased his purple masked brother.

"Uh oh," Leonardo muttered.

"We better stop 'em," Michelangelo said. Before Leonardo could respond his youngest brother began to run. Sighing the blue masked turtle followed his brothers. By now Raphael had chased Donatello outside the liar.

"Raph we're not a possed to be out here!" Michelangelo cried out.

"Yeah Daddy said it's to dangerous," Leonardo chimed in.

"Yeah come on Raph I'm sorry," Donatello said. "Let's just forget it ok?"

"Ah forget this," Raphael said lunging for Donatello. Then a scream was heard followed by a loud splash. Leonardo's blue eyes went wide. One of his brothers had just fallen into the raging water and didn't re surface. "Nooo!" Leonardo screamed.

A/N Well there you have the first chapter. Which of the turtles do you think fell? Let me know also if you like please tell me in a review.