The peaceful Nabu Island provides an opportunity for Class 1-A to demonstrate their hero skills and perhaps even gain insight into the Quirk that has eluded them. However, their vacation-like tranquil setting is disrupted by a menacing attack from a villain with a Quirk eerily similar to the one they are trying to identify. As the dots connect and it becomes apparent that the attack bears the hallmarks of Shigaraki, All Might's retirement and the citizens' lives hanging in the balance leaves Deku and his friends with no choice but to rise to the occasion and defend the island.