The film opens with a voiceover from Will Stronghold (Michael Angarano), who introduces viewers to a world teeming with superheroes. The most celebrated heroes are none other than his parents, the immensely strong Commander (Kurt Russell) and the breathtaking Jetstream (Kelly Preston). While the world views them purely as heroes, Will shares that they also run one of the nation's top real estate chains. As he braces himself for high school—their old stomping ground designed for super-powered youth—he faces a daunting reality: he lacks any powers of his own.
While Will’s parents plan their day, his friend Layla pays a visit to head to the bus with him. His mother offers Layla some breakfast, but she politely declines, citing her vegan lifestyle, tied to her mother’s ability to communicate with animals, who obviously don’t appreciate being eaten. Will, in a bid to please his father, fakes exercising to show off non-existent super-strength. His father gives him an inspiring talk about his hopes of one day having Will become a hero himself.
Just then, Will’s parents receive an urgent call on their bright red phones—they’re needed! They share a quick goodbye before descending into their Secret Sanctum, their covert base of operations. As they dash into action, a colossal robot wreaks havoc downtown. With stunning agility, Jetstream drops Commander onto the robot, saving the day amidst the cheers of the crowd as he claims the robot's eye as a trophy.
At the bus stop, Will and Layla encounter bus driver Ron Wilson who initially mocks Will for being a freshman, until he realizes who Will's parents are. After boarding the bus, Will meets his friend Zach and learns that Zach has just unlocked his own powers. Layla makes acquaintance with fellow students Ethan and Magenta. Ron expertly maneuvers the bus from a construction zone and steers it into the air, revealing their destination: Sky High, a school that constantly hovers to maintain secrecy.
Upon arrival, the freshmen face off against bullies Lash and Speed, who attempt to extort money from them but are thwarted by the student body president, Gwen Grayson. Will is instantly smitten and completely oblivious to her speech. The gym session opens with a dazzling entrance from Principal Powers and gets underway with Coach Boomer conducting a power placement process, where students demonstrate their abilities.
Zach’s lackluster powers land him in Sidekick class, much to his dismay. After several students are placed, Layla, refusing to participate in such a discriminating system, is labeled a Sidekick by default. The bell rings, signaling lunch, where Will spots a mysterious boy in leather—who is later revealed to be Warren Peace, the son of a superhero and a supervillain, leading to immediate tension given Will’s family history.
During gym class, when Will is confronted with a car drop test, he breaks down and admits he has no powers, resulting in him being deemed a Sidekick. The nurse reveals to him that while he may eventually inherit his parent's abilities, some children of heroes simply never gain powers.
Returning home, Will’s father urges him to hold onto the dream of being a hero, but Will’s anxiety grows as he feels inadequate before the mounting expectations. Meanwhile, a strange glow emanating from the Robot Eye suggests sinister forces are observing them.
As Will adjusts to his new life, he inadvertently gains super-strength during a lunch confrontation with Warren, changing the dynamics and splitting school allegiances. He eventually finds a place in Hero class and connects with Gwen, further complicating his emotions when he realizes that he also has a crush on her.
Over the course of the school year, conflicts arise, culminating in a Homecoming dance where Will discovers Gwen's true identity as the villainous Royal Pain. With her intent to raise a new breed of supervillains, Will faces dilemmas that test both his newfound powers and his friendships.
In a climactic battle, Will embraces his abilities, taking to the skies for the ultimate showdown against Royal Pain and her looming threats. With his friends rallying behind him, courageously opposing the villain as they work to thwart her plans, Will discovers that true strength comes from friendship, support, and self-acceptance.
Through these tangled adventures, Will learns invaluable lessons about loyalty and overcoming challenges, culminating in a Homecoming celebration where he reflects on how his relationships have evolved. With a touch of humor, he admits, > "my girlfriend became my archenemy, my archenemy became my best friend, and my best friend became my girlfriend." All in a day's work at Sky High!
