In shredder's dungeon Karai and Lizzie were trying to pick the lock then they heard someone coming so they stopped. Fishface brought them food

Karai: Well if it isn't the sushi I ordered. Can't you lay some masago for me?

Lizzie: or soy sauce?

Fishface: This is a dungeon not a bed and breakfast. You both will eat whatever I bring!

Karai: You mean whatever Tiger Claw tells you to bring

Fishface: If master Shredder didn't need you and Elizabeth I would teach you some manners!

Karai: Oh really? And what does he need me for?

Lizzie: I would like to know to

Fishface: Just watch your tongue's!

He walked away and shredder walked up to them

Shredder: I wish you both could understand. Everything I have done is for our clan's honor. Why do you insist on hurting me?

Karai and Lizzie didn't say anything

Shredder: Have you nothing to say to me daughters?

Karai and Lizzie: we are not... your... DAUGHTERS!

___________________________________

Later that night Raph and Leo snuck in the dungeon

Leo: Karai Lizzie it's us

Karai: Leo? Took you long enough

Lizzie: It's been weeks

Leo: Well we got tired of waiting for you to escape on your own.

Raph: Is this a rescue or a romantic comedy? Come on.

Leo was able to pick the locks and Karai and Lizzie got out of there cells. They both grabbed there weapons

Lizzie: did you really have to flirt right now?

Leo: w-well I-

Karai: wait how did you get past tiger claw?

Tiger claw was standing in front of them

Tiger claw: they didn't

The four of them attacked tiger claw and were able to knock him out

Karai: this isn't over tiger claw

Lizzie: not even close

___________________________________

The turtles Karai and Lizzie made it into the The Shellraiser Donnie drove off and they made it back to the lair

Mikey: we're finally home!

Leo: I hope this means you'll both stay. After all you are family

Karai: With Shredder after me what choice do I have?

Lizzie: I won't be staying. I'm going to go find my mother.

Leo: and we'll help you

Mikey: This calls for a family hug. Bring it in!

Splinter walks in the room

Splinter: Michelangelo what happened?

Mikey: It's just a scratch sensei. You should see the other guy.

Splinter: What have you boys done? I thought I told you...

He saw Karai

Splinter: Miwa....

Karai hugged splinter for the first time in her life and splinter hugged back

Karai: father...

Leo: You see sensei I told you my plan would work

Splinter: Perhaps some things are worth the risk.

___________________________________

The next day Lizzie and Karai watched the turtles train but Mikey was goofing off

Leo: Come on Mikey. Focus-

Mikey threw a water balloon at Leo and Lizzie stopped herself from laughing. Then all the turtles started fight

Karai: is this how training always goes?

Lizzie: I would guess most of time

Splinter: that is enough for today

The turtles and Lizzie leave expect for Karai

Splinter: Not what you expected?

Karai: I admit it's a little weird being with people I was told were my enemies. I'm sure Lizzie feels the same. What really happened between you and Shredder and my mother?

Splinter: that is a story for another day.

___________________________________

Lizzie went to see Donnie into his lab

Lizzie: I need your help with finding my mother

Donnie: Hmm... I should be able to find something.

He did some research on his computer

Donnie: all I found was a newspaper article about a building catching on fire. Alexa was sent to the hospital but then she just vanished without a trace

Lizzie: everyone leaves a trace. somewhere in New York I have a mother you may or may not know I'm alive and I'm going to find her. Dose it say where that building used be?

Donnie: yeah but you'll need our help with this-

Lizzie: I don't need anyones help but... thank you

___________________________________

Lizzie went to where the building used to be and saw someone there. It was Alexa

Lizzie: Are you Alexa Miller?

Alexa: how do you know my name?

Lizzie: because I'm your daughter

Lizzie showed Alexa the picture of her family. Alexa immediately hugged her

Alexa: Lisa... I thought I would never see you again

Lizzie: I have so much to tell you but not here

___________________________________

Alexa and Lizzie go back to Alexa's apartment. Lizzie explained everything

Lizzie: I was raised by shredder and told that hamato yoshi was the enemy but it was all a lie. The turtles helped me and Karai realize the truth. shredder told me his lies but what really happened that night?

Alexa: ...Your father was a member of the foot clan but left after he realized shredders real plans. Then we met and started a family. Of course shredder doesn't allow anyone to leave his clan. He found us in our home and took your fathers life. The shredder set the place on fire. I barely escaped that day and saw him take you away when you were just a baby. I remember him saying you have potential

Lizzie wanted revenge more than ever now

Lizzie: after all this time don't you want revenge?!

Alexa: even if I did there's nothing I can do and we're finally together again nothing can change that anymore.

Lizzie: you're right.

___________________________________

Later that night Lizzie went back to the lair to get extra weapons and was about to leave when she saw Leo and Karai in front of her l

Leo: Going after Shredder alone is a bad idea

Lizzie: don't try to stop me Leo.

Leo: We want to go with you

Karai: you'll have a better chance with our help

Leo: Shredder will never stop hunting us. The only way for us to be safe is to take him down.

Lizzie: I can't ask you to risk your lives. the shredder took my father's life and almost took my mother's life. I won't rest until I make. Him. Suffer.

Leo: let us help

Lizzie: I'm sorry

She knocked them both out cold and left the lair

___________________________________

Karai and Leo eventually woke up and ran up to the rest of the turtles and splinter

Leo: Guys! Sensei!

Karai: father!

Splinter: Leonardo Miwa what happened?

Leo: Lizzie going to take out Shredder on her own

Karai: she won't make it out alive

Leo: We have to stop her.

Donnie: We can catch up to her in the Shellraiser!

Splinter: good luck my sons and daughter

___________________________________

Lizzie sneaks into shredders lair but he not sitting on his throne

Lizzie: what the...

Shredder walked in the lair

Shredder: Elizabeth

Lizzie: Shredder...

Shredder: You returned even sooner than I expected

Lizzie: I don't want to hear anything you have to say unless your screaming for mercy!

Lizzie attacked shredder but he dodged every attack

Shredder: Foolish child. I taught you everything you know. You hold no surprises for me!

Shredder hit Lizzie against the wall hard and tiger claw grabbed her

Tiger Claw: Still no sign of the turtles

Shredder: They can't be far behind. Take her to Stockman. It is time to begin the experiment

Lizzie: let me go you ugly cat!

___________________________________

Lizzie was taken to Baxter Stockman's lab and put in a cage hanging above giant tube of mutagen

Tiger claw: You are more ruthless than I thought mutating your own cub

Shredder: I have no intention of mutating her. She is bait. When the turtles attempt to rescue her I will drop them into the mutagen

The turtles and Karai enter stockman's started fighting the foot bots tiger claw and shredder. Leo jumped on Lizzie's cage

Leo: hang on Lizzie!

Lizzie: thanks for coming

Suddenly shredder cute the rope Leo was able to jump out of the way but Lizzie fell into the mutagen

All: ELIZABETH!!

After a few seconds Lizzie climbed out of the mutagen and landed on the floor. She was now a mutant tiger and was ready to attack shredder but the lab caught on fire. a pile of rubble crashed to the ground in front of Lizzie

Lizzie: NO!

Leo: we have to get out of here!

Lizzie: not until the shredder is dead!

Leo: Lizzie please

Lizzie wasn't as angry anymore and escaped with the turtles and Karai

___________________________________

They all stopped at the top of a building

Raph: that was the stupidest thing you've ever done!

Lizzie: I'm alive aren't I?

Karai: you got mutated into a cat

Lizzie: if anything I'm stronger now.

She left before anyone could saw anything else

___________________________________

Lizzie went back home and her mom was waiting for her

Alexa: what happened? where were you?

Lizzie hugged her mom

Lizzie: I'm so sorry mother... you were right about everything

Alexa: it's alright promise me you won't make the same mistake again

Lizzie: I promise