Back at the Flynn-Fletcher house, Linda & K had finally returned from their shopping.
"Riley will look so beautiful in this dress," K marveled "I can't wait to see her try it on."
"Ah good afternoon dear," Lawrence said, as he and Dick came into the main room.
"K, this guy is so cool," Dick said happily "he has all kinds of neat junk."
"He does sell antiques dear, I should think so," K replied "where's Riley? I want her to try on this dress."
"Riley, your mom wants you!" Dick called, but there was no response. "Hmm, that's odd."
"Maybe she's in Candace's room," Linda suggested.
She walked over and peered in the door, but found no sign of Riley, or her daughter.
"That's odd, Candace is missing too," Linda commented "and she hasn't called me with some crazy story about Phineas & Ferb either. Honey, have you seen Candace?"
"No, I was showing Mr. Daring my collection of antiques most of day," Lawrence replied.
"I only broke three of them," Dick replied proudly.
"Well, she probably went out looking for the boys," Linda said "I'm sure they're just out playing or something, having the time of their lives."
"Let me out!" Candace yelled, rattling the bars of the cell she had been locked in, alongside Stacy, Tasumi & Riley "let me out of here!"
"Candace, you've been doing that for the last five minutes," Stacy told her "nobody's going to let us out, so knock it off."
"Don't tell me to knock it off," Candace said "it's your fault we're in here in the first place. If you hadn't opened your big mouth and told the guy we knew his plan, he would've let us go!"
"That's not true and you know it!" Stacy shouted back, "and anyway, we wouldn't even have come here if 'somebody' hadn't been trying to bust her brothers."
"Speaking of, where are those two, anyway?" Candace wondered.
"In the cell next to you," Phineas' voice responded "we can hear everything you say."
"Yeah, well then hear this," Candace replied "when I tell mom after this is all over, you two will be grounded until you're my age!"
"Would you please just shut up?" Riley asked.
"You don't tell me to…"
"SHUT IT!" Riley yelled "all day I've had to listen to you talk about catching your brothers, and for what? For trying to keep my brother and his friends from killing themselves with something they don't know how to use properly?"
"It's just that…"
"No, this time, I'm talking!" Riley interrupted "look at where your little obsession has gotten us; we've been captured by my mom's greatest enemy, who, it turns out, used my love of education to lure her into a trap. So instead of complaining, and blaming your brothers for stuff, I say we let them get us out of this mess. Any objections?"
Candace just stood there, shocked, as if she couldn't believe the girl had spoken to her in that manner.
"Okay then," Riley replied "Phineas, Ferb, you guys have a plan to get us out of here?"
"We use Shelton as a battering ram?" Todd suggested.
"I didn't ask for your ideas Todd," Riley replied.
"I think we can get us out of here, no sweat," Phineas replied.
"Good, but we have to hurry," Riley added "or my mom will fall right into Dr. Scorpious' trap."
Meanwhile outside, Doof & Perry had managed to get in when Perry used a laser to cut a hole in the side of the building.
"I wish you wouldn't mutilate my building Perry the platypus; now I have to hire a contractor to fix it later," Doofenshmirtz said "and you know what those guys are like."
Perry simply remained silent. "Okay, if we're going to stop Scorpious, we need to cut the power. The main power controls are in the basement area; I know, you're thinking 'he's an evil genius, why does he have his circuit breakers in the basement like everyone else?' Well, it was just easier that way, okay?"
Perry said nothing and headed towards the basement. "Wait, don't leave me here!"
Back at the house, Linda was working on making some treats for a celebration after Riley's award ceremony, unaware of its' true purpose. Lawrence had gone out to fetch the mail, and had returned with a small stack of it.
"Bill, sweepstakes entry," he said, as he looked over everything in his hand "another bill, and oh yes Katherine, this note is addressed to you," he told K. "Funny, I wonder how the post office knew you would be staying here?"
K said nothing and took the envelope, ripped it open and scanned the contents. After a few moments, she lowered the note and looked at Lawrence. "Pardon me, I need to have a private talk with my husband," she said, grabbing Dick by the arm and pulling him aside.
"Is this about the antiques I broke?" he asked K when they were out of earshot "because I will pay for them, I just need to borrow some money from you."
"Listen very closely; I just received a letter from Dr. Scorpious," K explained "he said that he has the kids and will destroy them unless I come to him."
So, what are you going to do?"
"I can't take the chance that he's bluffing," K replied "so I'm going to confront him. I want you to keep Linda & Lawrence occupied until I get back. Make up an excuse, I don't care what, but don't let them know what's really going on."
"Not to worry K, you can count on me," Dick said proudly.
"I know I can dear," K said, giving him a kiss on the cheek "don't worry, I shouldn't be more than a half hour" she added, before running off; Dick then returned to the living room.
"Is everything alright?" Lawrence asked "Katherine seemed troubled."
"Everything's fine, she just…um…," Dick stammered, trying to come up with a good excuse "she has diarrhea."
"Oh, how dreadful!" Lawrence said "well I hope she feels better."
"Oh she should be fine in a half hour, give or take," Dick replied "so, you like sports?"
"I do, although my tastes are more towards the sports of my homeland, like cricket & rugby," Lawrence replied "have you ever seen a cricket game before?"
"I honestly can say I have not."
"Well, perhaps there's one on the telly," Lawrence replied "I have a channel that's nothing but unique sports; saw a caber toss on there the other day. Very interesting."
"Sounds, er, great," Dick replied, trying to hide his discomfort.
Back at DEI, Phineas & Ferb were working to pick the lock on the door of their cell.
"I wish that Scorpious guy hadn't taken my phone," Candace whined "then I could call mom and tell her what happened."
"Yeah, 'cause that's worked so well for you before," Tasumi added.
"I don't remember asking you!" Candace snapped.
"And…done," Phineas said triumphantly as the cell door swung open "they sure don't make locks like they used to. Maybe we should work on an impenetrable lock someday Ferb."
"Quit yakking and get us out of here!" Candace yelled.
"Sorry sis," Phineas said, as he and Ferb used their screwdriver to pick the lock of the cell, freeing the others.
"Okay, let's blow this pop stand before those guys decide to check in on us," Candace suggested. As they went to leave, they heard moaning and pounding noises coming from nearby.
"What the heck is that?" Riley asked.
"Maybe it's a ghost, with the haunting, and the scaring, and the tragic death," Shelton suggested.
"Whatever it is, it's coming from over there," Isabella said, pointing to a nearby door.
"Stay back everyone, I shall prove my bravery by confronting whatever dark being lives in there," Baljeet said confidently.
"Um, did Baljeet get his brain switched while we were in prison?" Isabella asked, confused.
"Worry not friends, and most beautiful Riley Daring," Baljeet continued, sending a wink the young redhead's way "I shall find out what is behind that door."
"Did that Indian kid just wink at me?" Riley asked.
"Oh yeah, he's got it bad for you," Todd explained "he told us while we were locked up and waiting for you guys. He thinks you're a goddess or something."
"That's so nice…and a little creepy," Riley replied.
Baljeet calmly approached the door, trying not to show that he was in fact, quite terrified, as the moaning noises began to intensify. Closing his eyes, he reached for the doorknob, turned it, and threw open the door…
"Vanessa?" Ferb said, stupefied.
The teen stopped her struggles after seeing several familiar faces (and some she'd never seen before) looking at her. Phineas & Isabella ran over and quickly pulled the gag from her mouth.
"Hey, long time no see," Phineas commented "so, how'd you end up tied up in a closet?"
"My dad owns this place," Vanessa explained, as the two kids began to untie her "that Scorpious guy grabbed me to use me as insurance to make sure that my dad did what he wanted. What are all of you doing here?"
"It's a long story," Candace replied "can you just tell us where the exit is so we can get out of this wacko place. No offense."
"No, you're right, it is pretty crazy here," Vanessa responded "but I think the only way out is being guarded by Scorpious and his pals."
"So, we're stuck here?" Candace asked, angrily.
"But I need to warn my mom she's heading into a trap!" Riley exclaimed.
"Why does this Scorpious guy hate your mom anyway?" Candace asked.
"I guess I haven't been honest with you," Riley said "my mom is actually a British spy named Agent K; Dr. Scorpious is her nemesis, and several months ago, she stopped him from using the resources of a company named FleemCo, run by my previously unknown uncle, to take over the world."
"What?" asked a surprised Candace "your mom is a cool spy and you never thought to actually mention this earlier?"
"I didn't think you'd believe me," Riley replied.
"Are you kidding? After everything I've been through, your mom being a spy is hardly a shock."
"There might be another way out of here," Vanessa said, rubbing her wrists to restore circulation, "but it'll be risky getting to it."
"Then it's a risk we'll have to take," a determined Riley replied, "I just hope we can escape before mom finds out what happened."
Unknown to Riley, at that moment, Agent K & C.A.R pulled up to the DEI building.
"Well, this is the place," K said, looking over the note Scorpious sent her.
"If you want, I can transform into a helicopter and take you up there," C.A.R said.
"No, Scorpious said he wanted me to come alone, and I can't chance him hurting the kids," K replied "just keep the motor running, I'll be back."
With that, she did a backflip out of the car and ran off towards the entrance. She quickly surveyed the ground floor and found no one.
"No army of goons or robotic panthers?" K asked, "he's making this far too easy; I don't like that."
However, she simply strolled to the elevator and took it up to the uppermost floor. During the ride, the most charming little one hit wonder played. Finally, it stopped and when the doors opened, K flipped out, ready for action.
"Okay Scorpious, I'm here, now release the kids," she said, slowly scanning the room for any traps.
"Ah Agent K, so nice of you to accept my invitation," Scorpious's voice said from a chair at the other side of the room.
"I don't have time for pleasantries, I came here to get my children and their friends," K said "so you can give them to me, or I can beat you up and take them back."
"I'd prefer a third option," Scorpious replied.
Suddenly, a volley of lasers emerged from the ceiling; K quickly jumped to avoid one of the deadly beams, and used her skills to dodge and evade others. She jumped up and kicked one of the lasers, knocking off its' aim and causing it to destroy one of the others.
She ducked as two more fired at her, with the beams destroying the opposite units. Another laser narrowly missed her, but, timing her jump, she leaped up unto it. She then used it to destroy all the others, then pulled a small device from her belt, placed it on the laser and jumped off before it exploded.
"Lasers, really?" K said, "I was honestly expecting better, you've gotten soft."
"Oh, but I have so much more," Scorpious replied.
"Well I don't have time to play with you!" K said, launching a powerful kick that knocked Scorpious's chair over "now give me back my children, you…tape recorder?"
"Gotcha!" was the last thing K heard before a beam blasted at her. She tried to move, but discovered she couldn't.
"I can't believe you fell for the old 'villain rigs a tape recording of himself to a chair' trick," Scorpious mocked, as he emerged from nearby with his henchmen "now who's the one going soft?"
"All right you've got me, now let the kids go!" K demanded.
"I think not; my genius plan for revenge involves all of you," Scorpious said "in fact, I'm going to let you have the pleasure of watching me destroy them. But first, observe your children and their friends as my prisoners!"
Scorpious used a remote to activate a viewscreen, which displayed the empty cells.
"What? They escaped!" he shouted, before turning to his henchmen "I though I told you two to watch the cells!"
"We thought you said 'watch the shells'," one of them replied "so we got some seashells and watched them like you said."
"Why would I ask you to watch shells?" Scorpious yelled "oh never mind, they have to be here somewhere; find them and bring them to me!"
The two henchmen quickly scrambled out of the door and ran off.
"Looks like the kids were more resourceful than you thought," K said mockingly.
"Only a minor inconvenience," Scorpious replied "in the meantime, I'm sure you're wondering what my evil scheme is."
"Not particularly, but I know you're going to tell me anyway," K said.
"The device I blasted you with is an immobilization ray I created with the help of my new partners. Oh that reminds me, you haven't been introduced," he said "come on in fellas."
The other two supervillains then entered the room. "Agent K, this is the Regurgitator, & Khaka Peu Peu; guys, this is Agent K, my nemesis."
"This is the mighty agent K you've been complaining about?" Khaka asked "she doesn't look very dangerous, thank you very much."
"Well you don't sound very dangerous," K replied.
"Now that you have been introduced, on to our evil plan," Scorpious interrupted "we shall fire the immobilization ray at a satellite in orbit, which will allow us to spread its' effects all over the globe! And with everyone in the world, give or take a few people, immobilized, it will be easy for us to take over!"
"That's your big plan?" K said "I have to say, it seems less inspired than your previous ones."
"Hey, no one's ever tried to immobilize the entire planet, so I'm really breaking fresh ground here," Scorpious replied "and anyway, I spent most of my time coming up with my elaborate revenge plot; speaking of which, once my henchmen return with those brats, we can begin."
Elsewhere in the building, Vanessa was leading the kids towards an alternate exit.
"So what does your dad do that Dr. Scorpious would want to take over his building?" Riley asked inquisitively.
"He's, um, a scientist," Vanessa replied.
"How much longer to this exit?" Candace asked angrily "I wanna get out of this place before something else happens."
"Candace, no one knows we've escaped, so what could happen?" Phineas asked.
They then rounded a corner, only to find Scorpious' henchmen coming from the other side.
"There they are!"
"Why did you have to say that?" Candace asked, before the gang turned and ran the opposite direction.
"Quick, in here!" Riley said, opening a nearby door. Everyone piled in and closed it behind them as the two goons ran past; once they were gone, the kids stuck their heads out to see if the coast was clear.
"Wow, that worked out really well," Riley said, as she emerged from the closet, followed by the others.
"Yeah, I guess Dr. Scorpious isn't quite as clever as he thinks," Todd said "we'll be long gone before that loser even…"
The boy's thoughts were cut off when a trapdoor opened beneath them and everyone felling screaming down a twisting shaft. One by one, they landed in another room, each piling atop the other.
"That was fun, kind of like an amusement park ride," Phineas commented.
"Perhaps, but I'm afraid there's no amusement here," said a familiar voice.
The group of young ones looked up from their position on the floor to see Dr. Scorpious and his allies standing nearby, with Agent K, still frozen in place, behind him.
"Mom!" Riley & Todd yelled.
"So nice of you kids to 'drop' in," Scorpious said, snickering "that was a joke, on account of the trapdoor I installed, which I had conveniently forgotten about until just now."
"Let our mom go, you creep!" Riley said.
"And while you're at it, how about letting us all go?" Candace added.
"Oh, but then you all wouldn't be present to watch me take over this city, and then, the world," Scorpious explained "and I'd hate for you to miss that."
In the final chapter, Perry & Doof race against time to cut the power and stop Scorpious' plan. Will they succeed? And how will the pint-sized heroes be able to defeat these mighty super villains? Read on and find out.