When a world famous 10-year-old magician named Annabelle LeTwanette comes to town and shows off her magic skills, and gloating about it, Rachel decides to become a magician herself under the guise of "The Great and Powerful Rachel Flynn". Meanwhile, Natalie Baxter wants to show off her archrival Heather McQueen at the Googleplex Mall and causing major damage.

Isabella wants Rachel to become a Fireside Girl as they are invited to a Fireside Girls Jamboree where 5 Fireside Girls teams are in a task to search for the world's first anchovy pizza. Natalie plans to take over the world by making her the star of her first sitcom, and only Ernie the Chinchilla would stop her show from going on the air.

Rachel very evil counterpart, Nega-Rachel comes back to get her revenge and cause mayhem on the real world, by trying to be the better Rachel, but the problem is...her friends are not buying it, especially her little brother Eddie. Meanwhile, Ernie wants to stop Nega-Rachel with Natalie helping him since she doesn't want some other girl causing mayhem.

Rachel hosts her first sleepover while Natalie hosts her slumber party but Heather's is more popular than ever, making Natalie jealous, so she uses the Awesome-Slumber-Party-Atron to make it more better and more popular than Heathers.

Agamya-Michiko is afraid that her family's coming over to Rachel's house for a visit, but when the youngest member goes missing and wants to help her find her, Agamya-Michiko realizes that her family's not so bad after all. Meanwhile, Natalie Baxter is having the worst bad hair day ever and wants everyone to suffer the same bad hair day as she does with her new Bad-Hair-Atron.

Following the disappearance of her little brother Eddie, Rachel will have to entrust Agamya-Michiko, Bruce, Jennifer, David, and Jaret to embark with her in an adventure that will take them into Rachel's imaginary world. Meanwhile, Dr. Doofenshmirtz, wanted everything to be much simpler back then, so he creates a "Nostalginator", but someone else wanted to use it as well.

On the first day of summer, Rachel goes to Danville Park and begins making friends. Meanwhile, her pet chinchilla Ernie undergoes as a secret agent to stop teenage evil scientist Natalie Baxter, who plans to make herself more popular than anyone in the Tri-State Area. A 2nd Generation Phineas and Ferb story.