The Story So Far

Can Summer Last Forever? begins late one night towards the end of summer vacation. A man finds himself held prisoner in an evil scientist's lab. The evil scientist introduces himself as Dr. Heinz Doofenshmirtz and announces that by the end of the next day, he will be the new ruler of the Tri-State Area. After explaining his latest plan, Doofenshmirtz shoots the man with a mysterious weapon to keep his secret safe.

The next morning, which is the last day of summer, Phineas and Ferb create their biggest project ever to end summer vacation with a bang. In a grand unveiling in view of the entire city, they reveal their greatest masterpiece: a floating theme park featuring every kind of attraction imaginable, resting high in the sky directly over the city like a giant space ship. They invite everyone in the entire Tri-State Area to come celebrate the last day of summer with them up in their park.

It doesn't take long for practically the entire city to join the gang up on their sky-park. As far as she can tell, Candace is all alone down below, too focused on busting her brothers to have any desire to join in on the fun. At first she feels sorry for herself that once again the universe has conspired against her in preventing Linda from seeing, but once Candace realizes the full implications of being the last person in an empty city, she decides to take advantage of the opportunity to do all the crazy things she'd always wanted to but didn't in respect to societal convention, like spinning donuts in her Neddlington Nymph.

Meanwhile, as the kids are having fun on their park, Agent P heads off to begin his mission. Doofenshmirtz traps him in quicksand and begins to explain his latest evil scheme. Turns out Doofenshmirtz plots to remove every school from existence so that school can't start the next morning, allowing him to use the ensuing chaos to become ruler of the Tri-State Area. He then activates his School-Remove-Inator which causes every school in the city to disappear. Satisfied, he leaves Perry to perish in his trap and departs to make his move on the city.

While Candace is out having the time of her life, she stumbles on an empty lot where her brothers' school should have been. She calls the police, believing Phineas and Ferb were somehow behind it. The police send out an officer to investigate, and together they uncover the fact that every school in the city has mysteriously vanished into thin air, literally. Candace decides to go find her brothers to see if they might know anything about this while the officer heads off to investigate further. Meanwhile, Doofenshmirtz completes the process of brainwashing his prisoner and gives him orders that will initiate the next step in his plan.

Agent P barely manages to escape the quicksand with his life and goes searching for clues about Doofenshmirtz's plan. In the alley behind Doofenshmirtz Evil Inc., he finds evidence of a kidnapping and confronts the recently returned evil scientist about it. Doofenshmirtz explains that he had already released the man without harming him, since he was necessary for the next step in his plan. Agent P departs once more to find this man and learn his nemesis' true plan.

In City Hall, the mayor, Roger Doofenshmirtz, has just learned about the situation with the schools. He decides to hold a press conference where he will determine what course of action the city will take.

Using the resources of the OWCA and his clever detective skills, Agent P is able to track the man Doofenshmirtz kidnapped to his home but arrives too late. The man is not there, and Agent P receives word that a press conference is about to be held at City Hall. He puts aside his present mission and prepares for whatever Doofenshmirtz has planned at his brother's press conference.

After much searching on the sky-park, Candace finally locates her brothers with their friends and they find a small restaurant to discuss the things she has seen. Before they get a chance to, however, the news comes on a small TV set and they stop to watch the Mayor's press conference unfold.

Mayor Roger Doofenshmirtz begins addressing the citizens of the Tri-State Area while Agent P observes from a rooftop across the street. The secret agent watches in horror as his nemesis' work is displayed before all the world by the press and media. Roger acknowledges to the people that every school in the city is indeed missing. Due to the disappearances, he declares that school is suspended until such a time as the city will be able to accommodate the children and their educational needs once more. Summer just got an extension!

As Candace and the others watch, they along with everyone else are stunned by this news. There is no time for them to come to terms with this yet, however, for suddenly a man, who Perry quickly realizes is the one Doofenshmirtz kidnapped and brainwashed, interrupts the press conference and blames the Mayor Roger for what has happened to the schools. His words leave a mark on the crowd, and Roger withdraws from the news cameras before he is further humiliated. The press conference ends and the people begin to disperse, wondering if their leader was ever really as competent as they used to believe.

The kids immediately start to discuss the repercussions of school being suspended. Baljeet naturally mourns the suspension as he would a lost relative, but Buford takes the opposite stance and rejoices that there won't be any more school. When asked his opinion about school being suspended, Phineas looks like he is lost in a trance. Isabella snaps him out of it and asks him again. After taking a moment to collect his thoughts, Phineas says in a low voice, "I'm not sure I'm ready to go back to school yet."

When none of the kids looked like they were expecting a response like that from him, he further explains how important summer had come to be to him; how even though he knew school was important, this was an opportunity of a lifetime! One too great to pass up. Candace gets upset by his response and leaves, as does Baljeet; leaving Phineas feeling very guilty all of a sudden.

Fortunately Isabella is there to remind him of what's really important. She is able to persuade Phineas to change his mind in a way that noticeably brings their relationship a step further. No sooner has Phineas decided to apologize to his sister and friends than Baljeet reemerges, eyes wide with fright.

Baljeet tells the others that people are reacting to the news that school is suspended by rioting at Phineas and Ferb's park. Already a group of teenagers have begun rioting and looting not far from where the kids sat to watch the press conference. Suddenly everyone around them, in the restaurant and across the park, is frightened by the riots and frantically start trying to evacuate the park, so that things get even more out of control. The kids quickly come up with a plan to find Candace before things get worse and split up to search for her.

Meanwhile, as Roger Doofenshmirtz ponders how to deal with the situation, he is visited in his office by the man who had humiliated him during his press conference earlier. The man commands the Mayor to resign, threatening that more destruction will befall the city, further disgracing his name, if Roger refuses. Roger sees no other choice and accepts. After the visit he uses a secret passage leading away from his office to escape unnoticed.

In their search for Candace, Phineas, Ferb, and Isabella run into some trouble. They learn some of the teenagers who were causing the riots have come up with a plan to take control of their park, and they're kidnapping all the children who are still there so they can make the whole park kids-only. They want to get rid of all grown-ups so that the kids can stay aboard the ship and have fun, by themselves, forever. Phineas, Ferb, and Isabella refuse to join them and are almost kidnapped themselves when suddenly, in the nick of time, Perry arrives and rescues them. Meanwhile, Buford and Baljeet find Candace, and they all meet back up together to form a plan.

Elsewhere, plans are coming together perfectly for Dr. Doofenshmirtz. Using his Do-Whatever-I-Say-Inator, a device that turns anyone it hits into his mind slaves, Doofenshmirtz takes over City Hall with ease, now that Roger is missing. He quickly puts every government employee in the city under mind control and begins preparations for the final part in his plan.

Phineas wants to get everyone off their flying ship safely. Once that happens, then they can focus on the stopping the rioters. Additionally, he sends Baljeet and Buford back to the city to try and find out what happened to the missing schools. The others agree to help everyone evacuate the ship. It takes a while, but once all the civilians are off except for the rioters, the kids are approached by none other than Monty Monogram. Monty informs them he has intel that a squadron of police officers are on their way to the ship to arrest the rioters, to the relief of Phineas, Ferb and the others. That relief doesn't last, however, when the cops arrive at that very moment and arrest them all on the spot! Things aren't looking good, now that it appears that even the police force is under Doofenshmirtz's control!

The alternate ending to Can Summer Last Forever? begins here, with Chapter 18.