In shredder's lair Karai was thinking about her mom and Lizzie was thinking about her parents when shredder walked up to them

Shredder: What is it that troubles you my daughters?

Karai: we want to know the truth. The truth about my mother her parents and splinter

Lizzie: something doesn't feel right

Shredder: You know the truth. Hamato Yoshi took them away

Tiger claw entered the lair

Tiger Claw: I have returned.

Lizzie: I don't believe it

Shredder: Tiger Claw

Karai How?! You were eaten by a giant alien worm!

Tiger Claw: And you believed such a thing could contain my hate? My hate is what kept me going. As I tore my way out of the belly of the Kraathatrogon And finally, back here back to my enemies. I would have my revenge against Splinter against his hideous reptiles and against those who trapped me in that wretched worm's belly

Shredder: I will grant you this wish.

Karai: It's because of him that Splinter and the turtles are still alive in the first place!

Lizzie: he was defeated by teenager's and a rat

Shredder: Karai Elizabeth you will go with Tiger Claw. Destroy Splinter and the Turtles at any cost

Karai and Lizzie: Yes Father

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Tiger claw Karai and Lizzie were looking for the turtles through out the city

Tiger Claw: Having a hard time keeping up?

Karai: I was taking it easy on you since you're working with only one eye and no tail

Lizzie: don't forget battle scars

Tiger Claw: You think you're both clever? You're both fools!

Karai: we're the fools? You've faced the Turtles in battle before and lost. What exactly is your grand plan for revenge here?

Tiger Claw: To destroy warriors such as these you don't strike at their limbs you go for their heart

Lizzie: manipulation

Tiger: exactly. That's why the shredder sent you both with me

Karai: Because we know them. we know the places they go. we know their weakness. Their friends April O'Neil and Casey Jones

Tiger Claw: The riders of the worm. They will all pay for what they did to me

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The three of them ambushed Murakami at his noodle shop and Karai held her sword up to his neck

Karai: the turtles

Lizzie: splinter April and Casey

Murakami: I don't know what you're talking about.

Karai: Lying will only make this worse. Leonardo Raphael Michelangelo and Donatello. Where do they live?

Murakami: I don't know. Please...

Lizzie: ...Karai that's enough

Karai: your right. There's no honor in this

She backed away from Murakami

Tiger Claw: I didn't come here for honor

Tiger claw threatened Murakami and he told them everything he knew. Tiger claw and Karai left but Lizzie looked at Murakami

Lizzie: I'm sorry

She caught up with Karai and tiger claw

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Karai and Lizzie ambushed April while she was walking home from the movie's

Karai: April

Lizzie: listen to us

April: You want to do this? Fine. But I'm warning you I've been training with Master Splinter big time and I'm ready to kick your butts.

Karai: We didn't come to fight. We came to talk.

April: ...Oh well I've been trained in that too

Karai: All our lives we were raised to believe that the Shredder was our father. That Splinter was the enemy. So when Leo told me that Splinter was my true father I couldn't accept it But then I began to have doubts about Shredder's honor

Lizzie: I don't even know who my real family is anymore

Karai: the Shredder has sent Tiger Claw to destroy the Turtles. He's trying to use us to set a trap for them. But we can't. Even if it means betraying Shredder

Lizzie: the shredder raised me like his own daughter but a loving father isn't the first thing i would use to describe him. Still he was all I had at the time

Suddenly Donnie and Leo showed up to protect April

Donnie: get away from her!

April: Leo Donnie wait! You have to listen to what they have to say

Karai: We believe you Leonardo. I believe that Splinter is my true father

Lizzie: I believe splinter didn't kill my parents

April: I believe that they believe you.

Donnie: I believe April.

Leo: This this is great! I knew you'd both come around. We'll take you both to the lair to see Master Splinter.

Donnie: Raph's not going to believe this.

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The six of them went back to the lair and Raph was really mad

Raph: I don't believe this! What have you guys done?! What world do you live in that it's okay to bring the princesses of the foot clan to out secret lair?!

Leo noticed Casey was pretty hurt

Leo: What happened to Casey?

Raph: Tiger Claw threw him off a building. And you just brought his partners in crime home for dinner.

Karai: Shredder lied to us! We didn't know!

Lizzie: we want to know the whole story

Karai turned on a tracking Device without anyone noticing

Leo: Will you just listen Raph?

Raph: I've heard enough from you and your girlfriends. They're both probably leading the Shredder here right now

Splinter walked in the room and saw Karai and Lizzie

Splinter: Miwa... Elizabeth...

Karai and Lizzie: ...splinter

Splinter: both of you come with me

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Everyone went in the dojo

Splinter: I retain very little from my old life, but this I will never let go my daughter.

splinter showed Karai and Lizzie a picture of him his wife and Karai as a baby

Lizzie: W-Wait a second...

Splinter: Elizabeth I knew your parents. Your mother's name was Alexa Miller and your father was known has Repo

Lizzie took out the picture of her parents from her pocket

Lizzie: I-I never knew there names

Karai: I don't believe it You're telling the truth... All these years the Shredder has been lying to us.

Leo: Wait you can't believe it? I thought you did believe it. If you didn't believe it why did you both come down here?

Lizzie: I'm sorry Leo

Karai: what have we done?

Splinter: You both had to see with your own eyes. You both had to learn the truth for yourself

Karai: You knew we were lying

Lizzie: there has to be a way to fix this

Splinter: No doubt the Shredder's forces are on their way

Donnie: What was that last part?

Karai: Tiger Claw is tracking me.

Raph: I TOLD YOU LEO!

Karai: There's no time to argue! Me and Lizzie have to get out of here. We can lead Tiger Claw away!

Splinter: Go take Karai and watch over her. I will stay with April and attend to Casey. Miwa you are who you choose to be not what others make you. Elizabeth you always had a good heart no matter what the shredder has done to you

Lizzie: thank you

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The turtles Karai and Lizzie went to a different part of the sewer far from the lair and tiger claw eventually arrived

Tiger Claw: I can't smell you but I can hear you. Show yourselves!

The turtles attacked tiger claw but were taken down. He pointed his sword at leo. Karai and Lizzie walked up to tiger claw

Tiger claw: Elizabeth Karai would you like the honor of finishing the turtles?

Karai: we have no honor but that's about to change!

Lizzie: starting with fighting for what's right!

Karai kicked tiger claw in the stomach and Lizzie kicked him in the face but they were both eventually taken down to. Tiger claw grabbed Lizzie and Karai and then escaped

Leo: Lizzie! Karai!

Raph: I still don't trust them.

Leo: Are you kidding? They saved us.

Raph: The Shredder raised them. Daddy's probably welcoming her home right now.

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At shredder's lair tiger claw dropped Lizzie and Karai in front of shredder

Tiger Claw: They have betrayed you Master Shredder. They fought alongside the turtles

Lizzie: YOU LIED!! SPLINTER DIDN'T KILL MY PARENTS!

Karai: HE'S MY FATHER ISN'T HE?!

Shredder: ...yes. You are both right

Lizzie and Karai: what?

Lizzie: why?! What did my parents do to you?!

Shredder: your father betrayed the foot clan to be with your mother. No one leaves the foot clan. Alexa is still alive but only because I don't care about her life. Tiger claw take them away

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Tiger claw locked Karai and Lizzie in different cells that were next to each other