Prologue: Summer

"Ferb, I know what we're going to do today."

It's been six years since that one summer day when the famous brother, Phineas and Ferb visited the second dimension. They might have forgotten all of the things they did on that day but it didn't mean time would stop just like that because today would be the day when the fate of multiple world come together again.

"We're going to build a dimensional transporter," the red haired boy finished. It was the start of summer with school just started and the two brothers-of-invention were once again making the impossible possible back in their backyard. Phineas wore an orange hoody with blue jeans while Ferb sported a white long-sleeve polo with a vest on top, wearing black slacks.

Ferb gave his brother a thumbs-up and took out a blueprint from his pocket. He started unfolding the small piece of paper until it was twice their sizes.

"Where did you get that Ferb?" the green haired boy simply shrugged. "Well never mind that, we better get started before the day ends."

The two smiled and started taking out the things they would need from their room. There were screwdrivers, nails, a hammer, a few nuts and bolts, and a few other things a pair of teenagers would never be seen using anywhere else except for Danville.

The entire backyard was filled with the sound of welding and a hammer repeatedly hitting a nail. The boys sure worked fast since it didn't even took half a day and their little project was already taking shape. But let's take a break from our friends' little experiment and see the events unfolding on another dimension.

The second dimension, a world that used to be under the control of the evil- and I mean the evil Heinz Doofenshmirtz. Compared to the state it was back then, you would have expected something good to happen. But sadly that's just not how things were looking. Burn marks could be seen on everything. There were holes on the houses and cracks on the streets. The entire place looked better when it was still under Doofenshmirtz control. But what of the Phineas and Ferb of this dimension, what were they doing?

"Are you ready Ferb," the voice over the communicator asked. It was Candice Flynn, Phineas and Ferb's older sister. "Now remember the plan and don't get caught."

"Roger," Ferb replied, turning off his communicator. Ferb was wearing a black fatigue, a green bandana, and a pair of shades. He took a deep breath and held his gun closer. His thoughts wondered off as he waited for the signal, remembering the fun he had with his brother and their friends back when they defeated Doofenshmirtz.

But all of the pleasant memories of spending summer, doing things ordinary teenagers would do didn't last. Four years after their liberation a new threat came and took aware their hard earned freedom once again.

A huge explosion brought back Ferb from his walk down memory lane. It was the signal he has been waiting for. He quickly stood up and ran for the tower's entrance, ignoring the battle between the evil robots and the fireside girls. Once inside, he quietly made his way through the corridor and into the upper floors. But t wasn't easy. Left over guards patrolled through the winding corridors and traps were scattered through out the complex, all armed and dangerous. But Ferb was trained for this; he spent most of the two years fighting against the growing menace and was a master in espionage.

Finally at the top, there was only a single door left separating him from his destination. He walked up the door and turned the knob, slowly pushing the door open. Once inside, a small pink room was all to greet him. It had a queen-size bed on one corner and a small desk on the other. It looked more like a girl's room rather than that of a world conqueror.

"It seems like you've finally come, Ferb," A familiar voice echoed through the room. But Ferb simply stood there, listening to the person's voice. "I see you're still mad with what happened to your brother, Phi-"

"-Don't you dare say utter his name," Ferb interrupted.

A loud metallic sound came from behind the green haired soldier, where a throne made from gold and pink slowly rose.

"It seems like you've become a man of words since the last time we saw each other," the figure sitting on the throne taunted.

"And you didn't change at all," Ferb replied. "You're still the evil witch that stole everything from us."

"How harsh. I simply took everything that belonged to me, is that so bad?"

"None of these are yours." Ferb took his rifle and aimed it at the figure. "Now quietly step down from there and follow me. Your reign of tyranny ends here, Isabella."

Isabella grinned and stood up, slowly walking down from her throne.