Candace is bitten by a bat after watching a popular vampire movie with Stacy and worries that she is becoming a vampire. Phineas and Ferb's latest gadgets lead Candace to believe that she has indeed made the change from teenager to teen vampire. Meanwhile, Dr. Doofenshmirtz plans to change the Tri-State Area into a carbon copy of Gimmelshtump so that it will be easier to take over.
Candace and Stacy at the theater.
A werewolf and a girl chase after a bat, which happens to be a vampire. Candace and Stacy are at the theater watching a new teen-vampire film. As the film progresses Candace is impressed by the abilities vampires have. The movie finishes having the vampire becoming dust due to exposure to sunlight.
As they are leaving the theater, Candace accidentally knocks over a cage containing a bat, similar to the vampire bat in the movie, causing the bat to attack her. An employee from the theater tells Candace not to harm the bat as it is a rental, to which Stacy replies that is paying off, as Candace is screaming and running in circles.
Meanwhile, Phineas and Ferb question each other on what their project for today is. When Isabella visits Phineas and Ferb, she shows them her wilted bamboo plant. Phineas tells her the plant is not getting enough sunlight, and he suggests he help her with it. Buford. Baljeet. and Irving wonder why Isabella gets a special favor, and they ask for their own. Phineas responds by saying that today they're taking requests from everyone.
When Perry gets to his lair, he is informed by Major Monogram that Doofenshmirtz sent a scented letter via regular mail to the O.W.C.A. explaining that he no longer desired to conquer the Tri-State Area. Major Monogram send Perry to investigate Doofenshmirtz at Doofenshmirtz Evil Incorporated anyway.
On Candace's way home from the movie theater, Stacy states that Candace is lucky to have not been bitten by the bat because the bat may have been a vampire bat, which would have caused Candace to turn into a vampire herself. At first Candace thinks the idea is ridiculous, but upon entering the backyard, which Phineas and Ferb had already left, she finds the boys' latest creations.
Since the boys decided to take their friends' requests, Phineas and Ferb had fashioned for Baljeet a gravity defying barbell (which makes Candace believe she has gained super strength), for Buford an invisible anti-gravity field (which makes Candace believe she can fly), for Irving a mirror that does not show one's reflection (which makes Candace think her reflection doesn't show up in mirrors anymore), and for Isabella a lamp that shines a super-bright light for her bamboo (which makes Candace hiss in 'pain' and mimic the vampire from the
film). These inventions lead Candace to believe that she has indeed made the change from teenager to teen vampire.
Meanwhile, Dr. Doofenshmirtz traps Agent P with the world's stickiest substance, which happens to be a tile from the floor of the movie theater that Candace and Stacy visited earlier in the day. Dr. Doofenshmirtz tells Perry that he believes that the Tri-State Area would be easier to take over if the it were a backward land with superstitious residents instead of a modern city. He explains that that is why he plans to recreate the Tri-State Area into a village similar to the backward and superstitious land he grew up in, using his latest invention: the Gimmelshtumpinator.
A lonely vampire.
As Jeremy arrives to the Flynn-Fletcher home to return Candace her MP3 player, she evades him fearing that she might be a threat to him, she covers herself with a black cape and red sunglasses and runs away through the backyard, hoping to find Phineas and Ferb to be turned back to "normal".
As she searches throughout the city for Phineas and Ferb, she visits the town's Goth store, hoping to find apparel that will protect her better from the sunlight. As she runs through Danville, her red sunglasses also have the side effect of making red items be more notorious.
When Perry starts to fight Doofenshmirtz inside the Gimmelshtumpinator, they by accident cause the machine to start firing at random places throughout Danville, making them to become old fashioned Gimmelshtump buildings or objects.
"We're gonna need a dustpan and some glue."
Later on, Candace, still scared that she is now a vampire, visits Jeremy at the Slushy Dawg shop where he works and asks if she knew where her brothers were, possibly hoping that they could turn her back to normal. But while she is there, the Slushy Dawg gets changed into an old world bratwurst house by Doofenshmirtz's Gimmelshtumpinator. Candace then flees the bratwurst house only to be chased by villagers (really marathoners affected by the Gimmelshtumpinator).
She hurries home, but by then Agent P has managed to destroy the Gimmelshtumpinator, changing the villagers back to marathoners and everything else.
Candace then tells Phineas and Ferb that she thinks she is a vampire, Phineas asks her where she found this out. She replies, "The backyard," and he tells her that it was their inventions that caused her so-called vampire symptoms.
He then proceeds to take off her glasses and cloak. At first Candace is relieved that she is not, in fact, a vampire. Then, she turns into dust and is blown away by the wind. Phineas then remarks, "Ferb - we're gonna need a dustpan and some glue."
For a full transcript of "The Curse of Candace". click here .