With the Provisional Hero License Exam approaching, Class 1-A of U.A. High School's Hero Course is tasked with a disaster rescue training exercise, split into two teams. The scenario: a fire has broken out in a large underground shopping mall, and they must locate and protect mannequins representing trapped victims. Deku and the ten members of Team A begin searching separately for the victims, when suddenly a facility collapse occurs, trapping them underground! With the risk of further collapses, no electricity, thinning oxygen, and injured students, there's no time to waste. Deku and the others must combine their strength and Quirks to reunite with their scattered teammates and escape from the underground. Will they manage to survive safely—!?