They all split up to use the W.O.O.H.P jet while the Saturdays used their air ship.

"Can we still fly it?" Megan asked Marc. "Um, I wouldn't mind if we went on the air ship with the Saturdays."

"Any reason why?" Marc smirked.

"Oh, uh, you know, just to get to know them better." Megan smiled innocently and nervously.

"Okay, Megan, you can stay with the Saturdays while we're in the jet." Lee said.

"Oh, um, thanks, Lee." Megan smiled shyly.

Everyone then split up to take their own way to the venture while Megan sat with Zak while Whitney read a magazine.

'I'm so nervous,' Megan thought to herself. 'Why am I so nervous?'

Drew glanced back to her kids, but folded her arms as she had no choice but to take them along.

"Uh, wonderful weather we're having?" Megan smiled nervously to Zak.

Whitney saw that Megan was nervous and would help while reading her magazine. Zak looked back at Megan and soon went to talk with Fisk who was like a big brother to him. Megan sighed as she then sat down beside Whitney as she looked defeated.

"'Wonderful weather we're having?'" Whitney asked, unimpressed.

"I know, that was stupid, but what would you say?" Megan shrugged in defense.

"I would try to find out what he likes even though I am his sister." Whitney said.

"Right!" Megan face-palmed herself. "Why didn't I think of that?!"

"Because your mind is clouded by a crush." Whitney smirked.

"H-How did you know?" Megan asked.

"Oh, please," Whitney rolled her onyx eyes. "You obviously like my brother. I don't know why, but I can see it."

Megan seemed to blush.

"I don't know why, but like I said, I can see it," Whitney smirked. "You should try to get to know him better. Hobbies, favorite foods, common interests."

"Alright." Megan said.

"At least that's what my magazine advises." Whitney replied.

"Just don't hit on Lee or Akito," Megan warned. "It might be tempting, but Estelle is stronger than she looks. You're just lucky she didn't use a Brain Blast against you."

"What in the name of all of creation is a Brain Blast?!" Whitney glanced at her oddly.

"Let's just say it would hurt." Megan said.

"Uh-huh..." Whitney shrugged as she read her magazine from Cosmopolitan. "And as for Akito's girlfriend?"

"She's the Pokemon Princess, so she has a lot of powers and abilities of various Pokemon." Megan replied.

"Whoa." Whitney said.

"I take it you've heard of her?" Megan asked.

"I sure have." Whitney nodded.

"I just don't wanna embarrass myself in front of your brother, Whitney," Megan said. "I've never felt this way about anyone before."

"So then you'll need help." Whitney said.

"Oh, could you please help me?" Megan asked. "You seem to know more about boys than I do."

"Sure." Whitney shrugged.

"Oh, thank you, Whitney!" Megan beamed and hugged the girl. "Thank you!"

"Get off of me!" Whitney winced from the hug.

After a bit of pep talk for a while, they were almost coming in for a landing all together.

"And down we go." Megan said.

Once landed, they all soon left their jet and air ship.

"Nasty..." Zak commented as he took a look at the new location.

"Oh, my..." Megan frowned.

"Sorry we didn't tidy up," A man told them. "We didn't know we'd have company."

"You poor guys with your home destroyed." Felicity pouted.

"Yeah, it looks like you got the worst of it." Doc added.

"Who did this to you?" Felicity asked.

"Argost." The man sighed sharply.

"V.V. Argost?" Akito asked.

"He was here...?" Zak wearily added.

"Yes... They blew up my land." The man replied.

"That's terrible!" Felicity pouted.

"Right, he's a bad guy, I hear he puts on a pretty good TV show though." Zak commented.

"Yeah, and I hear it's a 'weird show' if you know what I mean." Whitney said with the air quotes.

"Apparently my son has been doing a lot of research." Doc told the man.

Fisk and Komodo soon wandered off as they found a big and juicy bug.

"Looks like those two found something to distract themselves." Marc said.

"Well, if your research finds a way to get my storm boosts, I'm listening." The man replied.

"He got it?" Drew frowned.

"They started there." The man nodded.

"Is that bad?" Tony asked.

"Okay, guys, seriously with all the mysteries," Zak said impatiently. "Do we get to know what's going on here? What's started again? What stone pieces?"

Doc and Drew looked to each other before they decided that Zak and Whitney should know.

"The Kur Stone." Drew revealed.

"Our dad was reading about that." Akito said.

"So, you know all about it then?" Drew asked.

"Oui," Felicity nodded. "Uncle Atticus told us everything. It's the key to find the ancient Sumarian beast called Kur, according to the legend, whoever controls the cryptid Kur, controls the world."

"Very good." Drew approved.

"So we have to take back the piece they stole?" Tony asked.

"If we can find it," Drew replied. "Kur can give it to you and only it can lead you to Kur."

"Who is Kur?" Marc asked.

"Some say he's the first ever dragon and was a Sumerian cryptid who ruled over other cryptids." Drew replied.

"Whoa." The teenagers said.

"You seem to know a lot about this stone." Whitney said to her parents.

"Your mother and I were on the team that discovered it," Doc told her. "At first, we didn't even know we had, but somebody else did."

"Let me guess, Argost, right?" Estelle asked.

"He disguised himself as a member of our crew, and by the time we found out, he was already gone, with The Kur Stone." Drew sadly nodded.

"Whoa." Lee said.

"The Secret Scientists tracked him down to Weird World," Doc went on. "We went in with a team of fifty. By the time we left that house of horrors, the world set on us."

"Argost stayed, but we got the Stone," Drew added. "And now that we knew what it was, we decided this was one secret needed to stay secret. Even from ourselves."

"Wow." Whitney said.

"We split it into three pieces," Doc informed. "Each left in the care of a different Secret Scientist. As long as we kept them apart, the key to finding Kur was set."

"But you didn't keep them apart!" Zak said. "Argost just got two of the pieces, right, and you guys are the only ones that're left?"

"Yes, but-" Doc replied.

"I hate to admit it, but Zak's right," Whitney said. "We shouldn't sit around here, and we have to get back home before Argost does!"

"Kids, just relax, our piece isn't at home," Drew replied. "We found a hiding place in the Amazon River years ago."

"Whew." Whitney sighed.

"Wait, you left it unguarded all these years?" Cherry asked the Saturday couple.

"Give us some credit, Cherry, I did not say it was unguarded." Drew told her.

"No, she's right, Mom," Zak replied. "Argost knew where to find two of the pieces, how do you know he didn't find the third? Why did Dad build this super fast air ship if we're not gonna use it? We should go now!" he then looked to Fisk and Whitney. "Back me up, guys!"

"Um, well..." Whitney said.

"Huh?" Fisk blinked.

"Zak, even if Argost knew where to look-" Doc began.

"No, we have to go get it," The man suggested. "Find some other way of keeping it safe."

"It is safe, and I don't think you're in the best shape to Memouse, Henry." Drew told him.

"This isn't just your decision," The man told Drew as the fly landed on his shoulder. "The whole world is effected by-"

'I'm not sure, but that fly looks a little dangerous.' Tony thought to himself.

"KOMODO!" Zak and Whitney yelped.

Komodo soon tackled down Henry so that he could eat the fly.

"Bad Komodo, bad dragon, very bad-" Whitney glared until she saw something on Henry's back. "Uh... Hey, Mom, what's that?"

"It's an Andro Parasite." Drew sighed.

"It feeds on impulses in the nervous system." Doc added.

"That's bad." Marc said.

"Everything Henry sees and hears will be broadcast through there whoever knows how to tune in." Doc told the others.

Akito's eyes widened. "Could that include Argost?"

"I... I'm sorry..." Henry weakly replied, revealing that Argost was behind that.

"So, then he doesn't know what's guarding it?" Akito asked.

"Greetings and good afternoon, Saturdays~" Henry smirked as he suddenly looked evil and spoke in a different voice that the family knew all too well before laughing evilly.

"That's... That's..." Zak stammered.

"No, this is impossible," Drew replied. "The parasite doesn't transmit both ways."

"Impossible?" Argost smirked. "Only one with a tragic lack of imagination would use such a vulgar word... We steal the cryptids, my dear. We live in the world of impossible."

"He sounds creepy." Megan said.

"I'm flattered, my dear, but I'm not interested in him." Cherry replied.

"Where are you, Argost?" Doc demanded.

"Thirteen years you've kept my prize from me," Argost glowered. "Thirteen years of tracking down you miserable, so-called scientists, the pieces of The Kur Stone... Thirteen years of pawning desperation into perfection!"

"I wouldn't call 2/3 pieces perfection." Drew scoffed.

"We'll see about that in Memouse, won't we?" Argost smirked.

"You'll never get the third piece!" Whitney glared.

Fisk also glared and looked like he wanted to fight against the man.

"Whoa, Fisk, no!" Zak told him. "Dr. Cheveyo is still in there somewhere."

"Zak's right," Whitney replied. "Man, I feel weird today, we can't hurt him."

"Sweet little children," Argost smirked to the Saturday siblings. "I've waited thirteen years for this, but why would you think I might let anyone else do the hurting?"

"Don't you dare touch Zak!" Megan glared.

"Ooh, quite a feisty young lady." Argost smirked.

There soon came insects which weren't ordinary ones and soon sprayed everyone before Argost kicked over something which sparked the secret base.

"Head's up!" Zak yelped as this wasn't a good sign.

"FREEZE!" Akito glared at the bugs before blowing them away with his super-breath, but coughed from the spray. "Aw, man, that smells worse than Pierre Le Pew's cologne!"

"What was that?" Tony asked.

"The Al-Kaseem Firecracker Beetle," Argost smirked. "Enchanted with a highly flammable intensive spray."

"Whoa." Vincent said.

"All activated by just a spark." Argost smirked to their doom.

Felicity and her cousins tried to take on the beetles based on their Loonatics training, but not even that was enough to get rid of them all.

"Oh, come on!" Vincent complained.

"I'm blasting as hard as I can!" Estelle groaned.

"There's too many of 'em!" Akito complained.

"Maybe our gadgets can help." Lee said.

"Better than nothing." Akito replied.

"A lot better than you guys." Tony said.

"Watch it." Akito narrowed his eyes and shook his fist before reaching into his utility belt.

"Alright, let's blast these bugs." Megan said.

"Who you gonna call?" Marc glared as he joined them.

The young W.O.O.H.P agents all came together and they took care of the beetles while Argost seemed to escape to South America.

"Hmm... Not bad," Cherry commented. "I guess Simon has a good eye for detail, he did recommend you to Jerry."

"Yep." Akito nodded.

"So, you know our secret, huh?" Tony asked. "How can we trust you? You're an adult too at that."

"Like that matters," Cherry replied dully. "I mean, I used to be in the Kids Next Door when they all thought Numbuh 0 was just a legend and not a real operative who discovered The Book of KND."

"Seriously?" Tony asked.

"Seriously." Cherry replied.

"But... I thought they wiped your memory when you turned 13." Tony stated.

"Yes, they do," Cherry explained. "Monty, Atticus, and I were given our memories back by Monty's son though, and Atticus was even able to keep The Delightful Children from Down the Lane as Sector Z forever and no longer Father's children bent on evil against the Kids Next Door."

"That's good." Megan smiled

"I can't believe he was able to do that," Cherry commented. "I felt so bad for those kids."

"Well, at least they're nice now." Akito said.

"Mostly..." Cherry hid a smirk.

Soon enough, a huge wave of beetles came behind them.

"Uh, kids, I hate to be the bearer of bad news..." Cherry said to the teenagers.

"There's a wave of beetles coming behind us, isn't there?" Megan groaned.

Cherry nodded as she feared for them all.

"Oh, crud." The teenagers groaned.

"You better run." Cherry suggested.

The beetles soon morphed into a ball and chased after them like in Indiana Jones.

"Oh, come on!" Tony complained.

"You have to stop Argost!" Henry told the others as he blocked the beetles.

KABOOM!

Everyone yelped as they were blown off the edge and now falling together.

"Here's the plan, I'll tie the tether lines!" Zak panicked as he brought out a rope. "I got one chance to get this right!"

Drew grabbed him by his pants as they soon grabbed onto the edge of a cliff.

"Whew." Whitney sighed.

"Everybody okay?" Doc asked his family.

"NOOOOO!" Zak soon yelled out.

"We're fine, Dad." Whitney told their father.

"Then why did Zak yell 'no'?" Megan asked.

"I guess he didn't get the adventure he wanted." Whitney guessed.

They soon rode off on the aircraft together.

"You know, in my plan, we wouldn't have gotten power-wedgied at 600 feet." Zak glared to his parents.

"I'm sorry, baby, I grabbed the first thing I could." Drew soothed.

"That must have hurt." Megan said.

"It did." Zak huffed as he crossed his arms.

Doc soon talked with someone who came on the screen while piloting the air ship.

"So, Zak, um, what do you like?" Megan asked.

"Oh, lots of things," Zak replied. "Like eating pizza, playing video games, watching Weird World on TV..."

"Cool." Megan smiled before realizing how similar his favorite show sounded to V.V. Argost's hideout had the same name.

Doc spoke with his colleague about the Kur Stone before suggesting that Zak and Whitney stay with him.

"Wait, what?" Zak overheard that. "We get the biggest mission of my life and you're leaving us with Odele?"

"Exactly." Doc nodded to appease his wife.

"Aw, come on." Whitney glared.

"Come on, Mr. and Mrs. Saturday, we handled those weird beetles, and I'm an agent even though I'm your son's age!" Megan helped defend the Saturday siblings.

"Is this because of those exploding spiders?" Zak asked. "I didn't know they would explode! Fisk dared me to throw a rock at the web!"

"What?" Fisk snarled. "No, I didn't!"

"All right, you're both coming." Doc gave in much to Drew's shock.

"Now that's more like it." Megan smiled.

"I don't like the idea either, Drew, but we might need them." Doc said to his wife.

"No, no I'll handle Argost myself if I have to-" Drew glared.

"It's not Argost that I'm worried about." Doc glared back assertively.

"Then what are you worried about?" Cherry asked,

Doc looked back at Zak and Whitney before sighing.

"You can tell Cherry~" Cherry cooed in a cutesy voice as they headed for Brazil.

"You didn't tell her?" Doc asked.

"She vanished from my life before Zak was born." Drew reminded him.

"Who did?" Whitney asked.

"I did," Cherry replied. "I went to college with your mother, Whitney until I had to leave due to... Mysterious circumstances which I don't wish to discuss right now."

"I understand." Whitney said.

"Manaus, Brazil, the heart of the Amazon Rainforest," Doc told Zak and Whitney. "The last Kur Stone is buried within there."

"It's a watering hole for the Tahitian Erawada," Drew added. "One of the most dangerous cryptids in South America, amphibious/predatory/venomous. There, we chose this hiding spot, nature's security system."

"Whoa." Whitney said.

"It is quite beastly." Cherry added without any trace of fear.

Tony started to shake in fear.

"We've been watching that riverbank for weeks," Doc told the others. "There's supposed to be a five minute safe window for us to bury the stone. If we can't stop Argost before he gets there, we'll have to hold off those cryptids long enough to retrieve the stone piece."

"You mean my powers?" Zak smiled. "Yeah, I can do that."

Fisk then grunted in his language, asking if he was important in the plan too.

"Of course you are, Fisk." Whitney said.

"Absolutely..." Drew added wearily at first.

"Good!" Fisk smiled and nodded with crossed arms.

"Besides, we wouldn't leave you behind." Whitney smiled.

Fisk smiled back to her and hugged her.

"Aw, get in here..." Whitney chuckled as she loved Fisk like another brother. "You're like another brother to me... Though I wouldn't mind a sister."

"Yeah, having a sister would be nice." Megan nodded.