As part of a special hero work recommendation project, the students of U.A. High's Class 1-A are temporarily stationed on the remote and peaceful Nabu Island. Tasked with running their own hero agency and handling minor incidents, they enjoy a brief period of routine hero duties. However, the tranquility is shattered by the arrival of Nine, an incredibly powerful villain capable of wielding multiple Quirks, along with his dangerous accomplices. Nine targets the Quirk of a young island resident named Katsuma Shimano. With pro heroes far away, Class 1-A must band together, pushing their limits beyond anything they've faced before to protect the islanders and stop Nine's devastating plans.