All Of Might and Deku accept an invitation to go abroad to a flying and portable manmade city, called'I Island', where they research quirks in addition to hero supplemental items at the special'I Expo' convention that is currently being maintained on the staircase . Throughout this moment, suddenly, despite an iron wall of security surrounding the staircase, a villain breachs the device, and the only ones prepared to prevent him will be Class 1-A's students.