In the late afternoon, Violet waits outside the school for her mom to pick her up. She thinks to herself she hasn't seen Wilbur or Magena all day. In hindsight, she should have predicted they'd ditch school. She can only imagine what they've been up to. Finally, Helen pulls up to the sidewalk and honks the horn for Violet to get in the car. Violet runs across the grassy front yard, gets into the car, and buckles up next to Dash and Jack-Jack.
"Where are Wilbur and Magena," asks Helen?
"They've been gone all day," answers Violet in a blase manner.
"They never went to class?"
"Not one."
"Well, do you know where they went?"
"They said they were going to the bookstore, but I highly doubt it."
Helen fumes internally to avoid disturbing her children. She would never have thought that taking in a pair of strange kids from another world would have been such a hassle. If they were her kids, she would give them the punishment that nightmares are made of. However, there's no time to go looking for them, especially since she has no idea where they are, so Helen decides to worry about them later and go pick up Bob from work so they can all look for Rollergrrl. She drives off with the kids to pick Bob up and set their mission into motion.
Later in the evening, on the docs at the edge of Metroville, a very important object is secured within one of the warehouses. This object is something that someone powerless can benefit from. It's to be kept in the warehouse until the city museum is ready to take it. Because it's so important, a squad of heavily-armed guards is patrolling around and inside the warehouse. They all contact each other on their walkie-talkies, giving status updates.
Below the docks, Rollergrrl swims in the water wearing an oxygen mask. She pops her head out of the water, underneath the dock with enough headroom for her chest to come out of the water. She then looks up at the wooden planks. She can see and hear the guards talking and standing right above her. She takes out a device from her belt and places it on the planks. She presses a couple buttons, which activates a countdown clock on the device. She dives back into the water and swims down as quick as possible. The guards above suddenly hear the beeping just before the device explodes, destroying a good chunk of the dock and sending the guards flying into the water.
Rollergrrl rises from the water once more and swims over to the remainder of the dock. She climbs up to find several guards aiming at her. As she's about to reach for her belt, a large net shoots out of nowhere and traps the guards, making them incapable of getting out. While they try anyway to no avail, Rollergrrl turns and sees Xander holding a net gun.
"What're you doing here," she asks?
"My dad sent me in case you needed a hand," answers Xander.
"I didn't hear anything about that."
"Why tell when I can show you?"
Before Rollergrrl can question this further, a dozen more guards charge at her and Xander. They both ready their gear and subdue the guards with little effort. Then, they make haste into the warehouse. The remainder of the guards attack, but Roller and Xander take them down. One guard tries calling for back up, but Xander shoots super sticky goo on his mouth, keeping him from talking.
After taking care of the guards, Xander and Roller walk to the middle of the room, where their goal is. They approach a small mechanical pedestal with unbreakable glass on it. Sitting on the pedestal is the final objective... the Cintamani. The Cintamani is a precious stone discovered and shipped from South Asia. It is told to have the ability to grant its holder whatever they desire. Xerex believes the stone's power is real and hired Rollergrrl to fetch it for him so he can carry out his plan.
Rollergrrl pulls out a rotation device with a needle. She points it against the glass, turns on the device, and the needle starts rotating and forming a circle in the glass. Once done, the glass circle falls and break on the floor. Roller puts her hand through the hole and takes out the Cintamani.
"Cool," states Xander, "how 'bout I give it to my dad for you?"
"Did he tell you to do that," ask Rollergrrl?"
"Either way, it saves you the trip and you still get your pay."
Rollergrrl accepts this and gives Xander the stone. Afterward, she drives off the docks on her cycle. Xander walks out of the warehouse with the Cintamani in hand and a wide smile on his face. He takes out a walkie-talkie from his jacket pocket and turns it on.
"I got the stone."
The Incredibles drive around the city in the Incredobile looking for any sign of Rollergrrl. While driving, Mr. and Mrs. Incredible discuss what to do with Wilbur and Magena when they get home. As the kids get bored listening to the angry conversation, Dash hears a faint motor sound coming from outside. He rolls down the window, looks out of it, and sees Rollergrrl driving her cycle up ahead on the other side of the road.
"Hey, Rollergrrl's coming this way," Dash announces!
"She'll just fire at us if we get close to her," Helen says. "What do we do?"
"Mom, throw me out the window! I can catch her!"
"... Alright. Just be careful."
Dash unbuckles his seatbelt and lets his mom grab him. Helen forms her arms into a slingshot, Dash gets in position as she aims, and she launches him onto the road. Dash lands safely and Rollergrrl drives past him, so he follows. He easily catches up to her, but she pulls out freeze-ray and fires at him. Luckily, he dodges her several blasts. However, he sees at least five cars are coming towards him. He serpentines around the cars to avoid them. Some of the drivers panic and abruptly stop their cars. After that, Dash gets an idea. He increases his speed to the point of zipping half a mile ahead of Rollergrrl. He eventually stops at a kilometer and immediately turns around for a little game of "Chicken."
Rollergrrl sees Dash coming back and knows what he's up to. She's confident she can win at "Chicken", so she revs up and goes along with it. She and Dash get closer and closer towards each other. They pierce their eyes, both self-assured that they'll succeed. Before they can ram into each other, Dash moves first and gets off the road. Rollergrrl briefly chuckles, but she realizes a large truck is about to run her over. She moves too, but she's about to run into a building, so she leaps off the bike and lets it crash.
Rollergrrl slowly gets up from the sidewalk, aching from the impact. As she breathes a sigh of relief, she's suddenly grabbed by a red elastic arm and dragged along the road by the Incredobile.
After ten minutes, the Incredibles park the car in front of an alleyway. Mrs. Incredible gets out of the car and drags Rollergrrl to the sidewalk for interrogation. Mr. Incredible keeps the kids in the car to spare them the horror of their intimidating mother. While in the there, he messes with Dash's hair affectionately, congratulating him on his quick-thinking (Pun entirely intended). Meanwhile, Mrs. Incredible grabs Rolland put on her "battle-ax" face.
"Alright, what've you been up to," growls Mrs. incredible!
"Well, since I finished the job, it doesn't matter," taunts Rollergrrl. "Xerex paid me big to get him the Cintamani, an Asian stone that apparently gives you power."
"Does it work?"
"Who cares? I'm loaded either way."
"Your paycheck will have to wait after your sentence. Now, hand it over!"
"I don't have it. His son, Xander, is delivering it for me."
Mrs. Incredible sighs heavily, disappointed at this setback. At the very least, Rollergrrl is finally caught. The Mrs. calls for her husband to toss the handcuffs over to her, and he obliges. She then cuffs Rollergrrl to a lamppost, keeping her there until either the family or the cops come to pick her up. Once she gets back in the car, the Incredibles drive off.
But little do they know that leaving Rollergrrl alone might have been a bad idea. She uses a laser in her gantlet to free herself from the handcuffs and flees.
The Incredible couple discusses what they should do about the Cintamani. As they do, they approach a stoplight and Violet looks out the window and sees someone familiar across the street, Ghostpire. She's standing in an alleyway, talking with Kronos and Xander. Violet asks her dad to pull the car over. When he does, they all see the three teens and feel suspicious. Since Ghostpire interfered last night, they think she and the boys might have something to do with the Cintamani. They decide they should what the teenagers are up to, so they send Violet.
Immediately, she turns invisible, steps out of the car, and goes across the street. She stays behind one of the buildings to listen in on the conversation.
"That was surprisingly easy," states Ghostpire.
"You have no idea," Xander confirms. "I only had to do half the work."
"We'll put in a good word for you over at HQ," says Kronos.
"Appreciate that. I look forward to working with you guys."
Xander reaches into his jacket pocket and pulls out the Cintamani. He's about to hand it to Kronos when he seems to get punched in the gut and socked up his chin, causing him to collapse. Kronos and Ghostpire stand there surprised and confused, both completely lost on what's happening. Their surprise grows when the Cintamani seems to quickly float off the ground and away from the alley. Kronos, however, puts together what is going on, so he runs over and grabs what feels like a wrist.
"Violet?"
Since she's been caught, Violet turns visible and Kronos lets go of her arm. Violet wonders how this random boy knew it was her.
"How do you know who I am," she asks? "Who are you?"
"Are you serious," asks Ghostpire, amazed at Violet's ignorance? "He puts on a pair of goggles and you can't recognize him at all?"
"What're you talking about?"
"Nevermind. Just give us back the rock."
"Give me one reason why I should."
"Because it needs to be kept safe and the authorities are incapable of doing that, so we have to."
"Oh yeah, that's sound logic. 'Keep it from being stolen by stealing it yourself'."
"It's more sound than sticking black tape over your eyes and calling it a disguise, not to mention fighting crime in high heels."
"I'm not taking fashion advice from someone who dresses like a giant bruise."
"How 'bout I give you a few, then we'll be twins?"
This catty argument gets the firey girls riled up. Violet puts the Cintimani stone in her belt and Ghostpire clenches her fists. Both girls ready themselves for a fight, but Kronos gets between them.
"Now ladies," he says, "let's not get carried away here. We're all on the same side."
"SAYS YOU!"
The super girls shove Kronos aside and start throwing fists. Violet starts, but Ghostpire dodges every hit effortlessly. When she gives another swing, Ghostpire takes advantage of Violet's lack of balance and trips her. Violet doesn't let it stop her, though, and she begins rapidly shooting energy fields. Ghostpire flips and cartwheels away from the fields before shooting with her zapper ray, which Violet blocks. In the Incredobile, Mrs. Incredible wants to help her daughter, but Mr. Incredible insists that Violet should learn to handle herself in a fight.
As the girls fight ferociously, Xander gains consciousness and sees the fight. He figures he should contribute and help Ghostpire. He pulls out a round-bottomed flask and a lighter from his pockets, lights up the flask, and throws it at Violet. She doesn't notice, but Ghostpire doesn't and out of the way. Violet looks up to see what's going on and before she can do anything, Kronos zips to her, grabs her in his arms, and quickly pulls her away from the explosion. Both teens breath with relief. Violet is genuinely surprised, though, that this criminal went out of his way to save her.
"Uh thanks," she says, "but I could've blocked that."
"Guess my instincts forgot to tell me," Kronos retorts.
Seemingly out of nowhere, a bolt of electricity shocks Violet, making her fall to the ground unconscious. Kronos sees that the lightning came from a smirking Ghostpire and her zapper ray. Kronos gives his jealous partner a look of vexation over her petty act.
"What," Ghostpire asks, pretending to be innocent? "I set it to stun."
As if experiencing deja vu, Ghostpire gets an elastic arm wrapped around her. Only this time, she gets tossed much farther and crashes into a parked car. Kronos is startled to see the furious Incredibles out of there car to avenge Violet. The most raging out of them, Jack-Jack, is about to throw a tantrum in Mr. Incredible's hands. This gives him an idea and he puts down the baby to execute said idea, allowing Jack-Jack to turn into the "demon baby." Demon Jack-Jack charges at Kronos, he zips away from the beast several times. Xander intervenes again by pulling out another flask and throwing it at Jack -Jack, which releases a sticky, gooey substance that traps the demon baby. Dash speeds towards Xander, but he throws another goo flask at the boy before he can reach him.
The Mr. and Mrs. help their children out of the goo, so Kronos and Xander take this opportunity to run away and help Ghostpire, but not before Kronos takes back the Cintamani from Violet, who is still unconscious. The boys go over and take Ghostpire by her arms to help her off the car.
"Hey, are you okay," asks Kronos concerningly?
"I'll be fine in a bit," answers Ghostpire, as her bruises and scratches start to heal.
"We should get outta here while we can," points out Xander, pulling out a small vial full of purple liquid.
Violet finally gains consciousness. As she slowly gets up, she sees the three teens took back the Cintamani. She forces herself to get up faster and charges towards them. Before she can catch them, Xander throws the vial to the ground, releasing a cloud of purple smoke. Violet runs into the cloud only to find nobody there. Once the cloud disappears, she can clearly see that the culprits are truly gone. Violet groans in anger over another failure.
The three teens are now across town, perfectly safe from confrontation. They all make their way to HQ to deliver the Cintamani and keep it safe. Little do they know they are being followed by a someone driving a black car, taking matters into his own hands.