My name is Priya the Platypus and I am the mate of OWCA's top agent. I'm expecting my fourth child at age nineteen but my pregnancy is riddled with pain and illness. To make matters worse, I might not even be able to reap the reward of my suffering. I've lived through a lot in my life but this time I'm not sure I'll be able to survive… (may not make sense if read as standalone)

Before going to a dentist appointment, Ferb warned Phineas to not touch his new box of tools. But, Phineas took it, without knowing that the tools and mechanical parts he was using were different than the ones he use everyday . They looks the same but they do different things. And after using them, his invention go wrong and send him and the gang to a distant solar system.

When Phineas and Candace wake up on a Friday morning in each other's bodies, they must find a way to switch back before sun set because by sun set, the change becomes permanent, and they become each other forever. Can they switch back before it's too late

Phineas and Ferb try to discover why Candace gets so distressed all the time and/or psychotic. Meanwhile, Doofenshmirtz creates a Cheat-Inator to win an Inator Raffle Contest, which Perry must of course prevent.