Summer is all about adventure for stepbrothers Phineas and Ferb in this animated Disney Channel comedy series. They're all about having fun, taking it from building roller coasters all the way to building tree houses, which eventually will morph into a giant robot. While their older sister,… More Candace, tries to catch them, things don't always seem to go her way when their mom comes home and Phineas and Ferb are just sitting under a tree with no evidence to support her, thanks to their pet platypus, who is secretly an agent out to stop an evil, if not slightly childish, genius.
Buford vows to become Baljeat's slave after he saves him from choking on a hot dog by eating four at once. Meanwhile, Candace tries to prevent Jeremy from seeing embarrassing photos she accidentally sent to his phone, and Dr. Doofenshmirtz shows off his newest inventions; the "Retireinator" and the "Re-Tire-inator,"
Candace, after joining the troupe herself, tries to earn enough Fireside Girls patches to get her a ticket to a sold out concert. Meanwhile, Dr. Doofenshmirtz plots to use a device that can turn metal into broccoli to destroy a bridge from a Fireside Girls cupcake factory in order to stall sales of them so their door-to-door sales won't interrupt his exercise regimes.
After feeling depressed when Jeremy cancels his date, Phineas and Ferb try to cheer Candace up. Meanwhile, Dr. Doofenshmirtz frames Perry the Platypus for a series of crimes by using clones of him, leaving his position at the O.W.C.A. in danger.
Isabella and the Fireside Girls set out to find the rare maraca nut tree so they can get its much needed sap for Phineas and Ferb's bubble invention. Their quest leads them to an old abandoned amusement park. Meanwhile, Pinky the Chihuahua must stop his archenemy, Professor Poofenplotz, from acquiring her favorite brand of hair spray, which she needs to look beautiful enough in order to plan taking over the world.
The boys are able to create a giant bubble which enables them and their friends to float and view all of Danville from above as Candace tries to bust them while on a practice drive with Mom for her learner's permit. Meanwhile, Dr. Doofenshmirtz tries to gain popularity by singing country and western music and Perry must stop him before the concert crowd submits to his latest invention.