As so typically earlier than, Candace tries to inform her two brothers Phineas and Ferb to mom Linda as a result of they’ve invented one thing loopy once more. However once more she isn’t granted the triumph, as a result of the decisive proof disappears earlier than Linda can take discover of it. The woman complains to her buddy Vanessa of her struggling and together with her comes throughout one other gadget that additionally appears to come back from her brothers. However abruptly they’re sucked up by the gadget, which seems to be an alien missile and kidnaps the 2 of them to a different planet.
Phineas and Ferb simply see them disappear, however a snapshot of the automobile helps to search out out the vacation spot. The 2 determine to construct a portal to get to this planet and save their sister, and so they can persuade Isabella, who has a crush on Phineas, and her mates Baljeet and Buford to accompany them on their mission. After they move by means of the portal, nonetheless, they find yourself on the laboratory of Dr. Doofenshmirtz, truly an arch enemy of the 2 stepbrothers, however they agree on a truce.
As a result of Doofenshmirtz is Vanessa’s father and units off with the boys within the rocket he constructed known as “Inator” on the flight to the planet, which is nearly thrown off target by a harmful ion barrier. After they lastly land there and are in a position to find the 2 women, the challenges are even higher, as a result of the planet poses a menace to Earth. Fortuitously, there may be nonetheless Perry, the platypus who adopted the rescue staff as a undercover agent .