It started out like any normal day for the Flynn-Fletcher siblings: Phineas Flynn, Marissa Flynn and Ferb Fletcher. Obviously accompanying the trio was none other than Isabella Garcia Shapiro, Buford Van Stormm and Baljeet Tjinder. However we're getting a little ahead of ourselves. After all the story doesn't make sense if we don't see how our favorite summer fun seeking children ended up where they were.

Candace looked out the window of her bedroom. Her siblings were sitting under the tree like always. As if on cue, there came the rest of the entourage. She could read the lips of Isabella's signature 'What'cha doin?' and of course Phineas was nerding out talking about ideas for the day.

"Just waiting for the weird stuff, then I'll go get Mom, and I'm gonna bust you," Candace uttered the words as if they were right in front of her.

Suddenly her cell phone buzzed, and she rushed to answer it.

"Oh, hey, Stace," Candace chatted, "Nah, just getting ready to bust Phineas and Ferb."

Candace's face suddenly froze as she listened to what Stacy was saying at the phone.

"Wait, seriously? No way! I'll be right there. Busting the boys can wait another day," she said, and then she gave a bit of an unassured smile, "I think."

With one final look out the window- -not really caring or noticing the kids seemed to have vanished- -, she ran out the door.

(note: not gonna be a ton of Candace in this. I feel like the show has way too much Candace centered plot)

Meanwhile, the kids and Marissa were biking down the street to their destination. They figured it'd be faster than walking. Marissa- -as always- -was staying close to Phineas, and Isabella stayed behind him so she could watch his hair whip in the end. Ferb, Buford and Baljeet just strolled casually. Phineas looked in the spot where he'd placed Perry to find the monotreme missing.

"Hey, where's Perry?" he asked, looking over at Marissa who shrugged.

Perry had managed to slip off his spot unnoticed by Phineas, and he made his way to his lair. He briefly had to revert back to pet mode as Candace came whizzing by, but as soon as she was gone, he put the fedora on his head, and he started to do the macarena. The platform he was standing on started to move down. As he entered his lair, he could see Major Monogram and Carl also doing the macarena.

"What'd you think of the new lair entrance, Agent P? Nobody would think to do the macarena to get in, don't you think? Plus, you get to dance your way into work," Monogram greeted all perky, and Perry gave a small shrug, causing Monogram to clear his throat, "Uh, anyway, Doofenshmirtz has been spotted around the Danville Mountain area. We don't know what he's up to, but put a stop to it. Monogram out."

Perry saluted, and he left. Soon as he was gone, Monogram and Carl started to do the macarena again, but- -even though he did it perfectly- -Carl was scolded for doing it wrong. Perry meanwhile had gone out to stop Doofenshmirtz's scheme.

Doofenshmirtz at Danville Mountain

Doofenshmirtz was standing next to his machine, putting the finishing touches on the invention. He expected Perry the Platypus to arrive at any moment. He tapped his foot as he waited. As he glanced up, he swore he could see a bunch of kids climbing the mountain. Eh, they won't be a problem for him. Plus, he wouldn't hurt a bunch of kids. Seriously, he wasn't that kind of person. There was a fine line between being evil and just being mean. Hurting kids? That's just...wrong. Heinz perked up when he heard the sound of his trap go off, but when he checked the trap. Perry was nowhere to be seen.

"Uh, Perry the Platypus? Are you in there?" he asked, and suddenly he was punched in the jaw, "Wow, you really get right down to it, don't you? Well, I only had one trap set for you, so I'm at a bit of a loss here. Let's just mix it up a little, you pretend you're trapped, I tell you my scheme, and then you beat me up. How does that sound, Perry the Platypus?"

Perry just shrugged, and he sat down.

"Good, now I've been thinking. I love snowglobes, and everybody hates snow when it's too cold to enjoy it," Heinz said, and he glanced to the side as he had a side thought, "I think that was...mentioned by some other character in a previous episode. Anyway, then people hate the heat when it's so hot out. Why not just put the Tri-State Area in a state of eternal S'winter...Not like eternal winter like in Narnia but in S'winter where it's cold and warm enough to satisfy everyone? Also, I had another thought. What if I trapped all of the Tri-State Area in a giant snowglobe? That way nobody would be able to escape the eternal S'winter, or I guess some people call it Wummer. Anyway, I'll be outside of the snowglobe and on it, it'll say 'Property of Heinz Doofenshmirtz'. You know what that means, Perry the Platypus? It means the Tri-State area will belong to me, and nobody can do a thing about it. So ha!"

Perry gave a slight roll of the eyes. The plan had potential, but knowing Doofenshmirtz there were flaws in the plan as always.

"Don't roll your eyes at me, Perry the Platypus. It's a clever plan. You're just jealous you didn't think of it first," Heinz said, and he stuck out his tongue, "Although, you're probably wondering how I'm going to make it S'winter if it's Summer. Well, I could just take a snow cone machine, and I could just crank that, but that would take hours. No, what I'm going to do is suck all the snow off of Danville mountain then I'll put it into a Multiplier-Inator to...you know...make it multiply. Then all I gotta do is place the dome on the Tri-State Area and BAM! I own the Tri-State Area, and there's nothing you can do about it."

Perry couldn't help but shrug as Doofenshmirtz just kept babbling as always, but he'll let him finish. It was how they worked.

"...and the globe won't be full of water. I mean I'm not going to drown everyone or anything like that," Doof continued, then he stopped, and he looked over a Perry, "So, since you're not trapped, I guess we just do it like this. I'll hurry as fast as I can to the button, and you try to stop me and so on. Dang, not trapping you turned me into a softy."

Perry shrugged, and they both got at it. Heinz was about to push the button for the machine, but as always, Perry was able to stop him and destroy the machine.

"Well, I guess that's that. It's a good thing I didn't order the giant dome yet," Heinz thought out loud.

Meanwhile, the children and Marissa climbed the mountain. Phineas had decided that today they should just hang glide (of course, knowing Phineas, they were upgraded). The highest point in Danville was obviously the mountain, so they all went to the top for a good take off. However, it was easily noticeable that the mountain was very crumbly. Phineas was ahead of everyone else to test what spots were safe to climb.

"Phineas, I think maybe this day isn't right. It seems really crumbly up there," Marissa said, trying her best not to look down. Like Candace, she wasn't a fan of heights, but it was only when she looked down that it scared her.

"Yeah, maybe we should turn back. I think this is high enough," Isabella added.

"Come on, guys, it's not that bad," Phineas replied optimistically, and then he looked up. The next area of the mountain looked extremely crumbly, but he looked down at the others, "We're almost at the top. I'm going to test if this next area is too unsafe. I'm less likely to fall since I'm the smallest."

Before Marissa could protest, he was climbing. As he climbed, he gently placed his foot to find the safest path. Unfortunately, as he advanced further, it created cracks which made the path very unsafe. Phineas could hear the crackle, but it was too late. The ground gave out, and Marissa panicked as she saw Phineas vanish from sight, gasping.

"PHINEAS!"