The film features an original soundtrack composed by Yamanaka Hiroshi, with a mix of energetic and emotional themes that complement the action and drama on screen. The movie's climax features a rousing finale with a reprise of the iconic My Hero Academia theme song.
The film ends with a post-credits scene that hints at a larger universe beyond I-Island. A shadowy figure, revealed to be a powerful villain from the My Hero Academia universe, is seen observing Izuku and his friends from the shadows. The scene ends with a tantalizing glimpse of a mysterious symbol, setting the stage for future adventures and connections to the main series.
As The Archon begins to wreak havoc on the island, Izuku and his friends team up with a new hero, a brilliant and charismatic young woman named "Astia," who possesses a unique Quirk that allows her to communicate with and control technology. Together, they form an unlikely alliance with a veteran hero, "Ectoplasm," a master of stealth and deception.
The story begins with Izuku and his friends participating in a hero training camp organized by the prestigious U.A. High School. During the camp, they receive an invitation to attend a special event on a remote island called "I-Island" (short for "Innovation Island"), where some of the world's most renowned heroes and inventors gather to showcase their latest technologies and discuss the future of heroism.
The film takes place in an alternate timeline, separate from the main My Hero Academia series. Izuku Midoriya, a young boy with a dream to become a hero, and his friends, including Katsuki Bakugo and Ochaco Uraraka, are about to embark on a summer adventure.
Approximately 120 minutes