[Episode starts with Karai and Shinigami, outside the temple.]
Shini: Seriously? A temple?
Karai: It's a front for a money-laundering operation. Taking it down will badly hurt the Shredder.
Shini: Your dad was one messed-up freak.
[The two girls enter the temple, opening the iron gates.]
Karai: Psst. Psst.
[Shini walks over,]
Shini: [amazed] Wow.
[They see millions of dollars. Hun and the Purple Dragons enter the temple and confront Karai and Shini.]
Hun: Well, well, well. I see we have an uninvited guest.
Karai: Hun.
[The two girls began to fight the Purple Dragons as Shini defeats Purple Dragons, hypnotizing Sid and knocked him down. Hun takes Karai down and threw her to a statue.]
Hun: You think you can take the Shredder's place, but you are just a spoiled little girl.
[Suddenly, a smoke bomb comes out of nowhere, and blinds Hun while Leo overpowers him. Leo is in the black suit.]
Leo: [flirting] Miss me?
Karai: You always have to make a dramatic entrance.
[Shini throws the money happily.]
Shini:[screams and laughs hysterically] Look at it all!
Leo: There's millions here.
Karai: Shredder should've kept it somewhere a little more safe.
Shini: So what are we going to do with it? Do you know how much cool stuff we can buy?
[Leo and Karai nod at each other, Leo, Karai and Shini burn the temple to the ground and leave.]
[Theme song.]
[In the lair, the Turtles (minus Leo), April and ICK play Mazes and Mutants.]
April: You enter the treasure vault when three Pus Trolls attack! It's a trap! Ice Cream Kitty?
Kitty: [meows.]
[Kitty rolls the dice.]
April: Ooh, 16. The Pus Trolls are frozen by your ice spell. But the Slime King approaches.
[Chompy fires at ICK as Mikey comes to her defense.]
Mikey: [annoyed] Raph! Chompy is making Ice Cream Kitty melt.
Raph: That's because she's cheating. Ugh, and the ice cream is getting the dice all sticky. I don't know how you talked me into playing this stupid game again.
Mikey: Just roll, dude.
Raph: Okay, I attack with my Fire Ax.
April: 19. Your attack defeats the Slime King, and you win his plus-two Amulet of Audacity.
Raph: [triumphantly] Yes! In your face, Kitty.
Kitty: [meows angrily.]
Donnie: Hey, Leo, aren't you gonna play?
Leo: What? Oh, no, you guys go ahead.
Carlos: Breaking news from Chinatown, where a fire has burned down a mob warehouse, destroying millions in cash. Some face-painted gang members arrested at the scene failed to comment.
Raph: Bet you anything that place was Shredder's.
[The camera shows the tied up Purple Dragons with paint on their face.]
Mikey: [laughing.] Dudes, look at their faces.
Donnie: That definitely looks like the handiwork of that crazy girl Karai's running around with.
April: Should we do something? Leo?
Raph: Not gonna defend your girlfriend, eh?
Leo: Whatever, Raph. I'm out of here.[leaves]
April: [suspicious] I don't know, Donnie. I got a weird feeling Leo's hiding something.
Donnie: [confused] Like what?
April: I'm not sure. I think he's up to something with Karai.
[In Karai's lair, Karai is training while Shini plays video game. Leo enters still on the black suit.]
Shini: Ah, look who finally showed up.
Karai: Having trouble sneaking out so Splinter doesn't see you?
Leo: We need to be more careful, Karai. You can't just go charging in like that. If I wasn't there as backup, you and Shinigami might have been taken down by Hun.
Karai: Don't flatter yourself, Leo. I had Hun right where I wanted him.
Leo: The Purple Dragons are one thing, but just us three against all of Shredder's army? We should get the others.
Karai: Your brothers aren't interested in going after Shredder's empire because Splinter won't allow it.
Leo: We're outnumbered. We need help.
Karai: On that, we agree. Omaetachi, mae e.
[Ninjas from Foot Clan appear, however, they look different. They are red ninjas from Japan that they were seen seventeen years ago.]
Karai: Shinigami recruited these new Foot Ninja from Japan.
Leo: But these guys are mercenaries.
Karai: They're perfect for our cause and for our next target.
[Shinigami gives Leo the photos of Shredder's factory Auman Chemicals.]
Leo: Shredder's chemical factory?
Karai: If we can destroy it, we'll cripple his organization big-time.
[Leo watches at the photos, throughout unconvinced, but reluctantly agrees. Back in the lair, Mikey wakes up.]
Mikey: [yawns.] So hungry. Haven't eaten in an hour.
[Exhausted, Mikey goes to the kitchen, opens the fridge.]
Kitty: [meows.]
Mikey: Excuse me, kitty kitty mama.
Kitty: [meows agitatedly.]
Mikey: What's wrong, girl? Something wrong with the pizza? That sneaky Dr. Squirrelenstein? No? Robo-vampires? No? The guys? Leo? [gasps.] I should wake him up. He'll know what to do. Thanks, kitty.
[He runs off and checks Leo's bedroom.]
Mikey: Leo? You awake? Leo?
[He opens the door, but Leo is not there.]
Mikey: Oh, no. Guys! Guys, wake up!
[Mikey runs to his brothers.]
Raph: What is it, Mikey? This better not be Dr. Squirrelenstein again.
Mikey: Worse, there's no sign of Leo, and he's not picking up his T-Phone.
Raph: One guess where he is.
Donnie: We should head to Karai's. I'll run a trace on his phone. Let's go!
[Leo, Karai and Shini arrive at the factory.]
Karai: We plant explosives, get out fast, and blow the place. Shredder will never know we're here.
Shini: Uh, somebody will know we're here.
[Below is Rocksteady and Tiger Claw.]
Leo: This isn't gonna be as easy as we-
[They all get hit by Bebop's attack]
Bebop: Hee-hee! Gotcha, son. I sniffed you a mile away. Whoo-hoo!
[Shini throws the glue back at him.]
Bebop: Oh, snap. You goo-ed me with my own goo. That's sick, yo.
[Footbots surround them]
Tiger Claw: I was hoping you would show up here, girl.
Rocksteady: Let us make with the crushing already.
[Karai whistles, summoning the red ninjas.]
Tiger Claw: So the cubs recruited Foot Soldiers of their own. Let's see if they are worthy of the name. [roars.]
Karai: I didn't want it to be too easy.
[Meanwhile.]
Donnie: I think I found him. I tracked Leo's T-Phone to Auman Chemicals. They must be trying to take down Shredder's operation on their own.
Raph: Is he crazy?
Mikey: Yeah, this sounds like something you would do, Raph.
[Karai fights the Foot bots as Shini and Karai get surrounded by Bebop and Rocksteady.]
Tiger Claw: Don't worry about my Foot bots. I will finish you myself.
[They begin to fight. Karai started to put bombs all over the place.]
Shini: Come get me, dinosaur.
Rocksteady: Dinosaur? I am rhinoceros.
[Bebop crashed on bebop]
Rocksteady: Bebop.
Shini: Missed me.
[Crusher is about to crush Bebop & Rocksteady. They both rocket off as Shini continue placing bombs on the walls and catwalk.]
Both: [panicked screaming]
[Shini places another bomb as Leo sees more Foot bots.]
Leo: We got to get out of here!
[They begin to leave as Tiger Claw goes after him. Donnie, Raph and Mikey arrive.]
Donnie: This is it.
Raph: Let's do this.
Mikey: Booyaka- [in dismay] Aw, man, we missed the battle? Lame, dude.
Raph: They got to be here somewhere.
[Donnie looks and sees bombs, ready to explode any minute.]
Donnie: [desperate] Guys, out! Quick!
[Donnie shoved his brothers out of the factory, just as the bombs explode. Mikey and Raph crashed to the ground and recovered.]
Mikey: Raph, you okay?
Raph: I think so. Thanks for the save.
[Raph is about to thank Donnie for saving them, but Donnie is not moving, he gave most of his life to save them and now he is injured and unconscious.]
Mikey: [horrified] Donnie!
Raph: He's not moving.
[Leo and the girls leave as the turtle watches Raph and Mikey dragging an injured Donnie back to the Party wagon.]
Leo: [shocked and confused] Huh? Oh, no. What are they doing here?
Shini: Come on, Leonardo.
Leo: Just go. I have to help Donnie.
Karai:[realizes that her plan accidentally causes her adopted brother to get hurt] What? Donatello?
[An ice blaster almost hits her. Shini pulled her out of the way.]
Shini: Senpai, we must go.
Tiger Claw: There is no escape, young ones.
[They run with Shini using her star ninjas to destroy the blaster.]
Tiger Claw: Footbots, after them!
[Back with Raph grabs Donnie and puts him to the seat.]
Leo:[a bit agitated] What are you guys doing here?
Raph:[angrily] What are we doing here? We were looking for you when Donnie got blown up.[furiously punches Leo as he watches at him angrily]
Mikey: I know how much you like to fight, but the bad guys are still out there.
[Bebop and Rocksteady get in their car as Tiger Claw flies after them.]
Bebop: Ha-ha-ha! Think you can run, Turtles? Boom, baby!
Rocksteady: Hey! I want to fire lasers. They is my thing!
[They begin to fire]
Mikey: Don't mess with the party wagon. Cowabunga!
[Mikey fires a stink bomb at them]
Bebop: Dang, man. That is straight-up nasty.
Rocksteady: I handle this, comrade. Did no one tell Turtles they is too slow?
[Their tires burst loose and the van collapses.]
Tiger Claw: Now, to shell some Turtles!
[Tiger Claw opens the doors, but the turtles are not there... they have escaped, much to his chagrin. Later, the turtles arrive at the lair.]
All: Sensei!
Splinter: My sons!
Raph: The factory! Explosion!
Splinter: Take him to the dojo. I will prepare the healing mantras.
[The turtles take Donnie to the dojo.]
Leo: Sensei, wait. It's my fault. Karai and I we've been taking down Shredder's operations. I thought we could end this. I'm... I'm sorry.
Splinter: [disappointed] I have always warned you of vengeance. I am disappointed in you, Leonardo. But I am proud you had the courage to admit your wrongdoing.
Leo: If I had told the others what I was up to, they never would have gone into that building.
Splinter: It is right that you should feel pain for your mistakes. But it is one thing to regret bad decisions after they are made. A leader must foresee how bad decisions lead to bad results.
[April, Raph and Mikey look at Donnie's unconscious body, completely saddened. Leo sits down in shame as April comes to him.]
April: Leo, what were you thinking? I could've told you teaming up with those two was a bad idea.
Leo: I don't know. I guess I thought I could control the situation.
April: [comforts him] Karai's gonna do what she wants to do. You're supposed to be our leader.
[She leaves, Leo receives a text and sees the words Where U You? and New Mission from Karai.]
Leo: Guys, I'm sorry. I should have told you what I was up to. I know I probably don't even deserve to lead this team after what I did.
Raph: [huffs offensively] Hmph!
Leo: Karai's gonna keep going after Shredder. I need your help.
[Later, they arrive at Karai's lair.]
Karai: Leo! I didn't think you'd make it. So you're actually going against Splinter's wishes. How's Donatello?
Raph: He'll be fine. He's a tough turtle.
[Mikey picks up the black cat.]
Mikey: Hey, Shinigami, remember me?
Shini: You're the silly one. I like you.
Karai: We underestimated Tiger Claw's army. There's no telling how many Footbots he has. We need to go after the source.
Raph: A Footbot factory? Are you crazy?
Karai: It'll be worth it. Without soldiers, infiltrating Shredder's secret lair will be that much easier.
Raph: We don't even know where his secret lair is.
Karai: I thought you liked a challenge, Raphael.
Leo: Raph's right. I can't let you take this kind of risk.
Karai: I need your help on this one, Leo. For old time's sake.
Leo: Sorry, Karai. Your charms won't work this time. We'll stop you if we have to.
[Red ninjas arrive]
Karai: Have it your way.
[She used blinding smoke and they escaped.]
Raph: Well, that was a good plan.
[At the factory.]
Tiger Claw: Karai is sure to attempt another attack. Scan for explosives. We must protect this factory at any cost.
Bebop: No worries, G. We got it covered. Like mayonnaise on a hot dog.
Rocksteady: Even cockroach wearing the sneakers could not sneaks in.
[Karai and Shini arrive.]
Karai: A few Foot bots should be no problem. We take this place down quickly before the rest are.. Oh, no.
[The elite bots rise to the air.]
Shini: These don't look like Foot bots.
[Meanwhile, Leo and his team drove the shellraiser down the street.]
Leo: This is it.
Raph: I still can't believe you were working with Karai behind Splinter's back.
Leo: You don't have to rub it in.
Raph: Just saying. That sounds more like me. Remember when I wanted to dress up as the Nightwatcher vigilante, and you talked me out of it?
Mikey: You can always be Turflytle's faithful sidekick, Maggot Boy.
[Raph growls. In the factory, Karai and Shini are trying to fight the Elite bots. They grab Karai and Shini tries to stop them but gets pinned down. Karai tries to go after Tiger Claw but the Elite bot grabbed her.]
Tiger Claw: You are no match for our Elite Foot bots, girl. Do you think your thugs are true ninja?
[He punched her in the stomach and the bots took her away and tied her up.]
Tiger Claw: Foot bots, keep them close. If the Turtles arrive..
[He looked and saw the three turtles. The elite bot had been stabbed,]
Leo: Let them go, Tiger Claw!
Tiger Claw: I can always count on the hero.
[He fires his gun and the turtles begin to dodge and defeat the elite bots, freeing Karai.]
Leo: I feel like I'm making a habit of saving you lately.
Karai: Well, maybe if you could arrive five minutes earlier...
[Tiger Claw lunges, Mikey is trying to free Shini.]
Shini: Look out!
[She gets free and rocks down the robot,]
Mikey: I like your style, witch girl.
Shini: Then try to keep up.
[Raph and Mikey free the ninjas and they attack the Elite bots.]
Raph: I can't believe we're helping Foot Soldiers fight Foot bots.
Karai: We got to shut down these robots, or we won't stand a chance.
[She jumps the robots, while grabbing the purse and heads off, placing bombs around the factory. Raph comes and watches at the controls.]
Raph:[frustrated] Can't they just label the off switch? I can't believe I'm gonna say this. I wish Donnie were here.
[Bebop is attacking Shinigami, tries to get his revenge on her for gluing him on his own glue early.]
Bebop: You are gonna pay for gooin' me, girl. You know how long it took to unstick me?
[Shini dodged and kicked him in the head before disappearing in red smoke. Mikey is fighting Rocksteady.]
Leo: Uh, over here, horns-for-brains.
Mikey: Yo mama wears combat boots.
Rocksteady: Hey! Mama does wear the combat boots.
[He charged at the elite bots. Shini gets her hand stuck and Rocksteady crashes onto Bebop and her. Karai activates the machine and slips.]
Karai:[annoyed] Stop mashing buttons!
Raph: Wait, I almost got it! Maybe I don't got it.
Tiger Claw: There is no escape for you.
[Karai gets to the top and placed a bomb]
Tiger Claw: Wrong move. What do you think you're doing?
Karai: This.
Tiger Claw: What? No!
[She pushes the button and it explodes, Tiger Claw falls onto the bridge, causing the elite bots to malfunction and fall into the lava.]
Leo: Ninjas, move!
Tiger Claw: Stop them, you fools!
Leo: Karai!
Karai: Thanks, Leo.
[They leave the factory.]
Leo: Let me look at it.
Karai: I'm fine.
[She begins to heal herself by shedding her skin.]
Leo: I told you it was dangerous.
Karai: I told you I was fine.
[They leave the manhole. In the dojo, April and Splinter for Donnie to wake up until he opened his eyes.]
April: You okay, D?
Donnie: Is that ringing coming from my ears or my brain?
Mikey: Donnie!
Donnie: I'm okay. Wait, wait, don't touch me! No! [everyone hugged Donnie] Ooh. Aah. I'm hurting.
Karai: I'm sorry, Father. I'm glad Donatello is all right.
Splinter: Now you see the kind of pain and suffering revenge causes.
Karai: I know. I thought I could make this about taking down Shredder's organization, but it's too much of a risk going after petty targets just to spite him. I promise I will no longer go after Shredder's possessions. I'll go after Shredder himself.
[Karai looks angrily and vengefully as she draws her sword while the others watch as Splinter gets his hand off, trying to stop his daughter as the episode ends ominously.]