Flashback 16 years earlier A husband and wife walked in there apartment. There names were Alexa and Repo. Alexa was holding a baby girl

Repo: we can finally start our new life together. With our little girl Lisa

Alexa: it's everything I've ever wanted.

All of a sudden Alexa and Repo saw a fire coming from the hallway right outside the apartment. there baby started crying

Repo: we can't stay here! The whole place is coming down! we have to go now!

They were about to leave but the fire started to spread quickly and part of the ceiling fell right between Alexa and Repo

Alexa: REPO!

Repo: *cough* *cough* go! Go get help! I'll find another way out!

Alexa didn't want to leave him behind but had to get help. She climbed down the fire escaped with Lisa still in her arms and made it to the ground outside and sat on the floor as the fire fighters arrived. Lisa was still crying

Alexa: *cough* *cough* I-It's going to be Lisa I'm still here...

Alexa passed out from breathing in to much smoke that's when the Shredder stood outside the burned down building saw Alex passed out and Lisa in her arms crying. Shredder thought Alex was dead picked up Lisa

Shredder: you are mine to train now. I will call you Elizabeth

Alexa heard what Shredder said as he walked away. She wanted to go after him but was to weak to stand up and passed out again. Fire fighters found Alexa and took her to the hospital

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Back in the present Lizzie was training with Karai in the training room with the shredder was watching

Shredder: you have both showed improvement but there is still work to be done. Tonight you will find Leonardo and finish him

Karai and Lizzie: Yes father

Shredder left the training room

Lizzie: is Leonardo really a mutant Turtle? I didn't get chance to fight him yet

Karai: it's true and you will. I'll even let you take the first hit

Lizzie: you won't have to let me

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On top of a building Lizzie and Karai spied on Leo while he took down foot soldiers then came out of hiding

Karai: not bad

Leo: uh thanks?

Karai: you might actually be a challenge

Lizzie: try to keep up

Karai threw a smoke bomb in Leo's face Lizzie tripped him and Karai pointed her sword at him

Karai: I guess not. My names Karai this is Elizabeth. See you around

Lizzie threw another smoke bomb and they both disappeared

Leo: what was that?

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Later that night Karai and Lizzie were heading back to shredder lair

Lizzie: why didn't you finish him off? That was fathers orders

Karai: we'll just say he escaped

She saw Leo in an alleyway

Karai: looks like we have another easy chance

They both jumped down behind him quietly

Leo: where are those guys? Donnie said something about-

Karai: you always talk to yourself?

Leo turned around but wasn't surprised when he them

Leo: sometimes I'm the only one who will listen

Karai: we'll listen. When you beg for your life

Lizzie and Karai took out there weapons and so did Leo

Leo: lets see how well you do against someone who can see.

Lizzie: let's see how well you do when you're out numbered

Leo: lets see how well you when do when- lets just go!

They all started fighting

Karai: your good no wonder we haven't wiped you out yet

Leo: it's not like shredder hasn't been trying

Karai: I know. It's all her ever talks about revenge revenge vendetta vendetta

Lizzie: it gets a little annoying after awhile

Leo: really? I'm guessing you both don't approve

Karai: no we're fine with it. I'm just saying he needs a hobby

The fighting continued and Karai kicked Leo in the face

Karai: not bad but I've seen better

Leo: you know what? I don't think your as bad as you pretend to be

Lizzie: are you serious?

Karai: what part of swinging a sword in your head do you not understand?

Leo: on the rooftop you could've finished me but you didn't

Karai: because your the first thing is this city that doesn't bore me

Lizzie: there really is nothing to do around here

Leo: what about you? I'm sure you don't want to work for shredder

Lizzie tripped Leo again but he got back up but he was backed up into a corner

Lizzie: if I didn't then why would I enjoy fighting you so much?

Karai: besides I don't think your as good as you pretend to be. don't you want to to have fun to cut loose to live your own life?

Lizzie: isn't that what you want?

Leo was able to trip Lizzie and Karai this time but they got back up

Karai: I guess we struck a nerve

Leo: because I beat you?

Karai: meet us at the Byerly building

Leo: why?

Karai: I want to show you something

Karai threw another smoke bomb and they both disappeared

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Karai and Lizzie returned to shredders lair and kneeled in front of him

Shredder: I have learned that you both had the opportunity to destroy Leonardo but you let him go instead

Karai: that's not true. He escaped

Lizzie: we saw him get away

Shredder: I find that hard to believe

Karai: he escaped from you didn't he?

Shredder: enough! Next time you see Leonardo you must finish him understood?

Karai: we understand father.

Karai left and Lizzie was about to go with her but shredder stopped Lizzie

Shredder: you must not hesitate to destroy what is left of the hamato clan. They are responsible for your birth parents death

Lizzie: I will not fail again father I trained my whole life to avenge my family and serve you

Shredder: good now go finish Leonardo

Lizzie left the shredders lair and caught up with Karai

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By the time Lizzie found Karai on top of a building and Raph showed up

Lizzie: what did I miss?

Raph: what are you doing leo? Who are they?

Leo: uh karai Elizabeth meet Raph. Raph meet Karai and Elizabeth

Raph: what are you friends with them? We're out there risking our necks and your out here holding hands with the foot!

Lizzie: your the angry one aren't you?

Leo: I can explain!

Suddenly a giant mutant weed monster found leo and Raph and tied them up with vines.

Lizzie: this is getting hard to watch

Lizzie threw her sword at leo and he caught it. Then Lizzie and Karai jumped of the building and headed back to shredders lair