A Fairly Odd Summer

Jorgen Von Strangle assigns Timmy Turner to supervise the Fairy World's Yuck Factory, insisting he learn to earn income as an adult. Timmy reluctantly accepts, hoping this will help him impress Tootie and prove his maturity. The assignment kicks off a summer packed with magical mishaps.

Timmy visits Tootie at the Help Creatures Dimmsdale Research Center to show off his grown-up attitude. The center chief reveals a plan for Tootie to deliver a special cure for rare spotted dolphins to Hawaii. This sets the stage for travel and intertwined goals between two worlds.

The cure vial is accidentally swapped for Timmy's lip balm, and the cure's vial ends up packed in Timmy's travel case. Timmy takes the cure with him as he heads toward Hawaii, unaware of the mix-up. The mistake triggers a domino effect affecting both Fairy World and the human world.

Timmy learns his parents are traveling to Hawaii for a corporate vacation arranged by Mr. Turner's pencil company. He is pressured to perform a spectacular fire dance or risk being fired. The Hawaii trip becomes the battleground for Timmy's maturity and a test of his cleverness.

In Fairy World, Jorgen promotes Timmy to supervise the source of all fairy magic, Abracadabraium, while Jorgen travels to Hawaii for the Bronze Biceps contest. Timmy now carries greater responsibility and the worries of keeping fairy power safe on the vacation.

Timmy discovers the misplacements—the check in his father's sandwich and Tootie taking the cure vial. He heads to Hawaii carrying Abracadabraium in a bowling bag to fix the errors. The journey merges fairy duties with human family obligations.

Foop, the anti-fairy, meets the Anti-Fairy Council and vows to destroy Timmy's fairies by targeting the Abracadabraium. The council strips him of his bottle to compel him to complete the mission. He heads for Hawaii and encounters Mr. Crocker at the airport, forming a shaky alliance.

Timmy returns the cure to Tootie and the check to his father, then relaxes on the Hawaii beach with his fairies. Marty and Mitzy Mulligan, eager for Hawaii fun, escape from Vicky with help from Timmy and friends. The moment blends vacation calm with looming magical peril.

Crocker and Foop distract Marty and Mitzy and steal the Abracadabraium from Timmy, weakening Cosmo, Wanda, and Poof. Timmy and his allies scramble to reclaim the artifact before it can cause greater harm. The theft marks a turning point in the fairy world's vulnerability.

Jorgen discovers Abracadabraium is missing, and his anger changes his skin, leading to a humiliating loss in the Bronze Biceps contest. This setback motivates Timmy and friends to reclaim the magical artifact. The moment underscores the high stakes of losing fairy magic.

The group recruits Marty and Mitzy to help retrieve Abracadabraium from Foop and Crocker. Foop plans to drop the substance into a volcano lava pool to destroy it, while Crocker, having turned good, refuses to aid Foop but remains involved. The stakes rise as the mission intensifies.

In the volcano's heat, Foop tries to touch the Abracadabraium to destroy it, and Timmy wrestles with him. They tumble into a lava pool, but Timmy survives by absorbing some of the artifact's power and emerges as a fairy. Foop swears revenge as Poof banishes him.

With Timmy now a full fairy, Jorgen reassigns Cosmo, Wanda, and Poof to Marty and Mitzy, allowing Timmy to visit them. He uses his new powers to save his father's job with a crowd-pleasing fire dance featuring Crocker. Vicky is turned into a rabbit, and Tootie shares a dance with Timmy, signaling a new balance between worlds.

Foop is sent down the drain, described as the unspeakable horror, closing the adventure with a hint of ongoing rivalry. Crocker returns to normal, and the fairies settle into new assignments as Timmy continues navigating life between fairy and human worlds.