The world of heroes is in shambles after the devastation of war and the mass breakout from Tartarus Maximum Security Prison, leaving society in a state of total panic. Izuku Midoriya, back with his classmates from Class 1-A after a painful and lonely time, must prepare, along with the entire class and the remaining professional heroes, for the great final showdown against the fearsome alliance of All For One and Tomura Shigaraki. Between the arrival of the powerful American heroine Star and Stripe to support the Japanese forces, the presence of an unexpected spy within the school, and the organization of a desperate plan of attack to divide the enemies, tensions run high in a succession of decisive battles where everyone is called to push themselves far beyond their limits.