The leader of the Gollini
mafia family, Valdo, watches
All Might's final battle against All For One, and his final declaration of "it's your turn", dedicating himself to becoming the next "Symbol of Peace". In the aftermath of the
Paranormal Liberation War, Class 1-A (except for
Yuga Aoyama) track down escaped villains.
Izuku Midoriya attempts to rescue a young girl, Anna Scervino, but when he touches her, he convulses in pain. An eyepatch-wearing man with a mechanical arm, Giulio Gandini, suddenly appears and attempts to shoot Anna but is stopped by Bruno Gollini, who can create bubbles to slow down time. A flying yacht appears, carrying the rest of the Gollini family, including Valdo, who physically resembles the real All Might. After touching Anna, Valdo uses his enhanced Quirk to consume everything in the vicinity, including Class 1-A, transforming the yacht into a massive fortress. Valdo then contacts All Might at U.A. to inform him of his plans to "save Japan", with All Might denouncing him; in response, Valdo dubs himself "Dark Might". Class 1-A is separated, and Izuku ends up in a mountain area after his Quirk suddenly stops working. He encounters Giulio, who fights off assailants before reluctantly allowing Izuku to accompany him. They enter another area, where Izuku finds the Gollini member responsible for the Quirk erasure in a dome, Paulo, and defeats him. Dark Might arrives, knocks Izuku out with incredible strength, and punishes Paulo for his failure by dropping him into a void. Giulio saves Izuku, and they head out. They eventually make their way to a city area, where Deborah has used her Day Dream Quirk on the civilians, including most of Class 1-A, forcing them all to touch Anna, with most falling unconscious after. Izuku and Giulio are also brainwashed, but the vestiges of One For All free the hypnotized Izuku. Izuku gets Giulio to wake up as Deborah attempts to kill him using a brainwashed civilian, allowing him to break her Quirk's control over everyone. As he reunites with Anna, Giulio once again attempts to shoot her, but Izuku stops him, allowing the Gollinis to escape with her. Giulio reveals that Anna's Quirk is "Overmodification": by touching people, she can greatly enhance their abilities, but only to certain compatible people, while others (including herself) experience intense pain. Giulio's Quirk, "Neutralization", allows him to neutralize her Quirk temporarily, which led him to be hired by the wealthy Scervino family to care for Anna. However, the mafia learned of Anna's Quirk, murdered the entire family and kidnapped Anna. Giulio further reveals that Anna's Quirk will reach Quirk Singularity after overuse and that his own Quirk has been rendered unusable after losing his right arm during the Gollinis' attack. Giulio has to fulfill his promise to Anna years ago: to kill her if her Quirk goes out of control. Izuku and Class 1-A firmly believe there is a way to save her as they prepare a counterattack. While Class 1-A fights against monsters created by the fortress and helps the civilians evacuate, Izuku,
Katsuki Bakugo,
Shoto Todoroki, and Giulio confront Dark Might and rescue Anna. Meanwhile, the fortress makes its way toward U.A., so the Heroes fend off the fortress while rescuing the escaping people. While Bakugo and Shoto deal with two Gollinis, Izuku and Giulio make it to Dark Might, who uses his enhanced "Alchemy" Quirk to simulate All Might's attacks and overwhelms Izuku; Deborah uses Anna to attempt to kill Giulio, but Giulio manages to defeat her again. Eventually, Izuku is joined by Bakugo and Shoto, and the three defeat Dark Might, revealing his true face. However, Anna's Quirk begins to go berserk, causing the fortress to deteriorate, and Dark Might becomes monstrous. Giulio helps Anna while the three students defeat Dark Might, with Izuku using his ultimate Smash to destroy the fortress. Giulio is revealed to be compatible with Anna, causing her Quirk to overload his Neutralization, rendering her Quirkless. As everyone recovers, Giulio tells Anna he no longer needs to watch over her. Anna convinces Giulio to stay with her now that she is free. Elsewhere, All For One, who has escaped from Tartarus, waits patiently as
Tomura Shigaraki reawakens. == Voice cast ==