Summary: "I'm sorry I need to leave, but I think that we both need time, so I'm leaving for the city where I can forget it all." Only one problem, what city is that? And Phineas has to find her, or lose her forever.

A/N: Right, so now that Isabella has been decided, that she has left for China, and now Tibet, I bet you are all wondering what was in that capsule... Well, basically, she just lost all her memories, of her old life... And the only copy of them are in Phineas' possession. So now we are heading back to Phineas trying to catch up to Isabella before he loses track of her.

Chapter 4: Investigating Beijing

Phineas arrived at the PnF Airport a few hours after departing from Ferb. Knowing that if he could get somebody to remember where Isabella had gone, then he had a good chance of finding her before too much time had passed.

Phineas burst into the airport and found it more busy than he ever imagined it would be.

Phineas walked up to the counter and held out a photo of Isabella. "Excuse me, did this girl come through here looking for a plane ticket?"

"Um... yes sir," the woman at the counter asked. "Why do you ask?"

"That is Isabella Garcia-Shapiro, all of Danville is looking for her... I'm trying to track her down..." Phineas explained. "Where did she go?"

"Um... China if I recall... Sorry, I don't know which city in China she left for... Try Beijing..." The woman offered. "Almost all the planes from this airport heading for China will go to Beijing."

"Thanks," Phineas thanked her and bought the ticket to Beijing and went through security and went on the plane.

Phineas put the picture of Isabella on a clip and attached it to the seat in front of his. By some miracle, Phineas had gotten the one seat where he wouldn't sit next to anybody.

Slowly, Phineas pulled out his sketchbook and began doodling his ideas for when he got back to being with Ferb.

That was when he remembered Isabella...

"Or are you so entranced in your invention that you don't have time for your friends?"

Phineas stopped doodling for a minute as the plane rose into the sky before reopening his sketchbook and began doodling once again. But this time, it wasn't just his ideas or inventions... He was doodling Isabella.

After about a twenty hour trip, with a several hour stop in Hawaii, Phineas' plane finally touched down in Hawaii.

"I'm here Isabella," Phineas muttered. "Now where is your next clue?"

Phineas decided to get a higher view of the city and took a tram to the top of a nearby 'hill' where he could see the entire city, only to see how big it actually was...

"I'm never gonna find her in all of this..." Phineas said in dismay, not realizing that he had his universal translator built into the radio earpiece.

"Find who young one?" A person who looked like a Buddhist Monk asked, coming up to talk with Phineas...

"This girl," Phineas said. Phineas held up his picture of Isabella.

"Ah, Christine..." The man said, which gave Phineas a puzzled expression...

"No, her name is Isabella," Phineas insisted. "And I'm trying to convince her that she needs to return home..."

"Hm, she said as much, is her home in Dan...ville?" The man seemed to have some difficulty pronouncing the name.

"Yes, that's it!" Phineas said excitedly.

"Yes, I sat next to her while on the plane ride over here to China..." The man explained. "Christine told me that she was escaping her old life... That's probably why she gave me a name that is unfamiliar to you..."

"So where did your plane come in?" Phineas asked hurriedly.

"Shanghai..." The man said. "But we left for our separate ways once we got out of the airport. So, you might dig around in Shanghai for her..."

"Thank you," Phineas said before rushing off to catch the tram down the 'hill'.

Phineas got a ticket to Shanghai on a train, only to find the train station delayed by mechanical problems... "Oh come on," Phineas practically complained, then sighed. "Come on Isabella, please stay in Shanghai..."