Meet the Deedles

Phil and Stew skip school on their 18th birthday and are expelled by their teachers. Elton, their father, grows frustrated with their laziness and decides they need structure. The brothers retreat into a carefree life in Hawaii, living off Elton’s wealth.

Elton enrolls them in a boot camp at Yellowstone National Park to teach discipline. The boys travel to the mainland to start the program, expecting rugged training. They quickly learn the boot camp has already shuttered due to lawsuits.

Arriving on the mainland, they discover the official boot camp is closed and that Major Flowers plans to train them himself. He intends to give them survival lessons in the wild instead of a formal program. The prospect fills the journey with uncertainty.

En route to the improvised camp, Flowers accidentally drives them off a cliff, ejecting them from the vehicle. He believes he may have killed them and immediately vanishes into the forest. The brothers survive and decide their own path.

The brothers steal clothing from a nearby campsite and slide down to the ranger station by luge. A collision with a park sign worsens their misfortune. They hope to blend in as natural recruits.

At the ranger station, the two collide with park staff and are misidentified due to the names 'Mel' and 'Mo' on clothes tags they took. The staff assume they are two highly-touted National Park Service recruits. The mix-up forces the brothers to adopt the new identities.

The brothers awaken in the hospital and realize they are being treated as Mel and Mo. They decide to go along with the ruse to survive and learn about the real recruits' roles. They discover Mel and Mo were expected staffers at the station.

Phil develops a mutual attraction with Jesse, the lieutenant and Captain Pine's stepdaughter. The romance creates tension with Captain Pine and complicates their cover story. The brothers struggle to balance duties with growing feelings.

A former park ranger, Frank Slater, hatches a plan to divert Old Faithful's hydrology through underground pipes to his own geyser, 'New Faithful'. He intends to stage an anniversary celebration to publicly humiliate Captain Pine. The scheme would give him wealth and influence.

Mel and Mo later arrive after a string of mishaps and reveal the Deedle brothers as imposters. Jesse and Captain Pine are upset, and the brothers are expelled from the park. Undeterred, they decide to stop Slater's plan anyway.

Despite the expulsion, the Deedles parachute onto Slater’s land to stop him. They are immediately taken underground to Slater's base. A friendly prairie dog helps them navigate the tunnels and reach the critical pipes.

Wearing protective heat suits, they halt the diversion of superheated water and restore Old Faithful. The failed scheme triggers an explosion on Slater's land, creating a natural wave pool. Visitors suddenly have a new surf spot in the park.

Slater and his henchmen are arrested for their crimes, and the park reinstates the Deedle brothers. Elton arrives, proud of their persistence and growth. The family begins to repair its reputation through their newfound service to the park.

With Jesse by their side, they surf the new wave pool and celebrate at the park's newly formed attraction. The park embraces the revived geyser and the brothers' renewed purpose. Elton watches proudly as the Deedles ride the first big wave in the revived attraction.