After class several people from class 1A state they want to get things for the training camp, so they all go shopping. Where Izuku is caught by Tomura who threatens to use his quirk on Izuku if he doesn't cooperate. Luckily for Izuku this is seen by Ochaco who goes to alert the mall's security "What do you want, Tomura?" Izuku said only for Tomura to say "I want to know how you know that name." "I know from the teachers" Izuku said, only for Tomura to add another finger to Izuku neck (making it four) "Liar, I know you couldn't have gotten it from a teacher because how were you if they themselves didn't know my name." Tomura said, only for Izuku to say "Alright, alright one of my quirks is being able to tell names. I hid it out of shame for how useless it was to hero work." Only for Tomura to inch the last finger closer to Izuku's neck and say "Nice try but you were quirkless before All Might gave you One For All." Only for Izuku to say "How do you know that?" "Let's just call it my secret, I won't tell you about. Now back to the question how..." Tomura was interrupted by the appearance of the mall's security "Oh, no. Looks like we're out of time, next time Izuku, next time." Tomura said

"Are you okay? Are the babies okay?" Izuku's mother asked, only for Izuku to answer "I'm fine mom, everyone's fine. Don't worry mom." "Don't tell me not to worry especially if you keep getting into trouble like this." His mother said, only for Izuku to say "But it wasn't my fault this time, it was that guy Tomura's fault." "Was it because I can't help but feel none of this would had ever happened if you didn't receive One For All." His mother pointed out, only for Izuku to say "Yah and I would still be a worthless nobody if I didn't, who thinks about suicide." "Oh, honey suicide isn't, I had no idea you felt that way I'm so sorry." She said then started to hug him and said "Maybe this quirk won't be so bad after all, it saved my son after all." "I'm glad you finally understand, mom." Izuku said while hugging back

"All Might, I need to talk to you." Izuku said "Damm right, you do. Do you know how worried I was especially about the babies when I heard the news." All Might said, only for Izuku to say "Tomura and probably All For One know about One For All and that I have it." "What, this is trouble kid. I don't think you should do this anymore especially with the kiddos." All Might said, only for Izuku to say "But how do they knowing One For All change anything? It's not like they can force it out of me, I still get to decide." "Because they exactly can do that through torture, assault and I don't even want to think about it especially what they can do to the kiddos to get it out of you and oh no the kiddos. I didn't even think about what that means with them having One For All, what will they do to the kiddos to get they One For All from them? I don't think I can do this, I can't." All Might said starting to hyperventilate, only for Izuku to say "Breathe All might, breath. I don't think they know that the kiddos have One for all or that they even exist because Tomura said I was quirkless before getting One For All , so I don't think they know and as for they knowing One For All. If they really wanted it, they would've kidnapped me for it. So, all's right with the world." "Yah, you right kiddo, I'm sorry about almost talking One for All. I'm just super worried about you and especially the kiddos." All Might said, only for Izuku to say "I know." "Now onto more important matters like you coming with me to I-Island" All Might said, only for Izuku to say "Wow, I can't wait."

"So you going to be a father, how does it feel?" David Shield asked "It feels incredible but you must already know about that feeling, having had one of your own." All Might answers "Yah, but I wanted to see how you fault, ten kids must be scary." David says then All Might says "Yah but we'll manage." "Good, that's good to hear. Now onto the matter at hand, get inside the quirk scanning machine." All Might did as asked, the machine reads out that All Might's quirk levels are dropping "Why has your power levels dropped drastically?" David asks only for All Might to give a vague response, not wanting to tell David about One For All

"So, what you're saying is this device can let me use my quirk at full power without injuring the babies." Izuku said "Yep, my dad cooked it up after All Might asked due you have only three shots with it. It's called Izuku's support, now let me feel the babies." Melissa said, only for Izuku to allow her to feel his stomach "Wow, this feels incredible. All Might was right, speaking of which he must be stoked to be a father." Melissa said, only for Izuku to say "Yah, he is. So if you guys know about the baby secret surly you must know about One..." Only to be interrupted by All Might who says "One great person you and your dad are, that's what he means." Then starts to laugh nervously, only Izuku got what he was trying to do. "Oh thank you, we think you two are awesome as well." Melissa said, only for the two to sigh in relief for her not getting it.

Later that night at the gala during All Might's speech, the alarms on the island went off. They (the island) issues a curfew meanwhile the gala is attacked by Wolfram and his gang who takes everyone they hostage except for David who they take with them. All Might notices Izuku and the others (Ochaco, Tenya, Shoto, Momo, Kyoka, Denki and Minoru) are on the third floor and explains the situation via Kyoka's quirk. "We should leave now, were not allowed to use our quirks." Tenya said, only for Melissa to say "Actually here on I-Island quirk usage is allowed." "We should try to help." Kyoka said with Shoto agreeing "I don't think we can accomplice anything." Minoru said with Momo agreeing. The awkward silence that follows is broken by Izuku "We should help everyone." "Have you learned nothing from the U.S.J incident." Minoru said, only for Izuku to say "We can help without fighting." "Yes, we can, I believe in you. Okay here's the plan, all we have to do is reset the security system which is on the top floor of the tower. Once that's reseted All Might can save everyone, are we clear on the plan?" Melissa said, only for everybody else to say "Yes" except for Izuku who says instead "I can't believe I'm about to say this especially since I was quirkless but Melissa, you should stay behind because your quirkless." "No, I'm the only one who can restart the security system. I want to save everyone just as much as you do, Izuku." Melissa said "All right, let's go then." Said Izuku who relays what they going to do back to All Might who disapproves but agrees to the plan. They scale over and get to the 80th floor which got a shutter that is cutting them off. Minoru opens the door to the main area of the floor. The security system notifies Wolfram about this who sends villains there. They (Izuku, Momo, Melissa, Minoru, Shoto, Ochaco, Tenya, Denki and Kyoka) go to a corridor only for shutters to closes them off from both ends of the corridor, Shoto uses his ice to keep one of the doors open long enough for Tenya to make a path to the plant factory. Kyoka then stops everyone when she notices the elevator going to the floor, they on. They decide to hide and hope the villains don't find them (Izuku, Momo, Melissa, Minoru, Shoto, Ochaco, Tenya, Denki and Kyoka) but it turns out to be Bakugo and Eijiro "We got lost." Said Eijiro being the only person willing to go with Bakugo on the trip. That's when the villains arrives and get aggressive, Shoto creates an ice shield to save Eijiro from Nobu's quirk as well as a pillar to raise them (Izuku, Momo, Denki, Minoru, Ochaco, Tenya, Shoto, Melissa and Kyoka) to the next floor. Shoto then explains the situation to Bakugo and Eijiro before they (Bakugo and Eijiro) engage the villains in battle. Izuku's group don't see a way forward but they notice a small door on a nearby roof panel. Melissa explains it leads to the maintenance room but can only be accessed from the inside. Momo creates a small bomb to open the door and tells everyone they can still use it to access the outside wall. The group volunteers Minoru for the job since he's the only one who could easily climb and fit in it, and Denki encourages him with the promise of a harem waiting at the end of this incident. Minoru uses his Quirk to scale the outside of the tower and completes his task by opening the way for his friends. In the control room, the villains are irritated by the student's resistance. They demand the invaders in the field deal with the students. The villains fighting Shoto and Katsuki prove to have strong Quirks. Daigo has a beast shifting Quirk while Nobu's Quirk allows him to hollow out space. Katsuki defeats Daigo with his Howitzer Impact move. He gets his sweat on Nobu, giving Shoto the opening to detonate it with his fire. After defeating the villains, Shoto and Katsuki check up on Eijiro. He's fine, just stuck in place by his own Quirk. They're interrupted when a mass of security bots flood the plant factory. Wolfram orders his subordinates in the control room to use the security bots to apprehend the students. Izuku's group passes the 100th floor and Denki notes how the shutters have opened for them. Ochaco deduces that the villains are trying to lead them somewhere. They reach the 130th floor and are greeted by dozens of security bots. Momo prepares a sheet of isolation for the group and they execute Plan A. Tenya uses his speed to throw Denki at the bots where the electric hero uses Indiscriminate Shock 1.3 Million Volts. The robots are able to defend against his Quirk so Denki turns up the voltage to two million. His power quickly fades out and Denki shorts out his brain. Tenya holds off the Security Bots who then orders his peers to switch to Plan B. Momo creates smoke bombs that interfere with the robot's systems. Everyone throws them at the robots while Minoru uses his balls to trap them. Izuku and Tenya use their strength to break through the blockade. Using Izuku's Support, Izuku pushes the bots back using 30% of One For All. Wolfram's subordinates notify him that the students got away and he deduces one of them has a sensory Quirk. The students make it to the server room on the 30th floor where they are ambushed by even more security drones. Melissa warns everyone they can't afford to damage the server room by fighting. Tenya and Momo offer to hold off the drones while Izuku takes Melissa on another route. Ochaco joins them and leaves everyone else to fight. Tenya takes on the bots using Recipro Burst while Momo creates a cannon that fires adhesive material. Izuku, Ochaco, and Melissa continue ahead as their friends fight. The bots manage to outlast Tenya's time limit and Momo and Minoru's bodies have reached their limit as well. The robots use restraining bonds to capture the kids. Izuku's trio reaches the wind power generation system where they hope to avoid getting ambushed again. Melissa asks Ochaco to use her Quirk to create a bubble to fly Deku and herself toward an emergency exit at the top of the tower. Shoto sends Izuku and Melissa to the top of the tower. Ochaco lifts Izuku and Melissa toward the exit, but this leaves her exposed to another robot ambush. Melissa tells Ochaco to release her Quirk but she refuses. Just before the robots get to her, Katsuki makes an explosive entrance and saves her. Shoto and Eijiro join the battle and repel the bots using their Quirks. Wind threatens to carry Izuku and Melissa away but Shoto acts quickly. Katsuki moves one of the wind turbines toward Izuku, and Shoto uses his flames to push hot wind in their direction, setting them back on course. Izuku takes a moment to thank Shoto for using his fire and then recalls Melissa's explanation for Izuku's Support. He uses a full-power Detroit Smash to break his way into the top floor of the tower. Ochaco releases her Quirk once they're inside and Wolfram learns of their advancement. He orders Swordkil to deal with the intrusion. All Might struggles to maintain his form but he continues to believe in his students. Izuku and Melissa recover from the fall as neither of them are injured. Swordkil suddenly attacks them both and Izuku grabs Melissa and rolls out of danger. Swordkil keeps up his attack using his Sword Hands Quirk but Izuku parries using Izuku's Support. Swordkil nearly gets the better of Izuku but Melissa helps him. The villain knocks Melissa aside but this gives Deku an opening to land a smash to defeat Swordkil. Izuku makes sure Melissa is okay before they continue their mission. Deku clashes with Swordkil. Izuku fights his way through more of Wolfram's henchmen until he and Melissa finally reach the top floor of the tower. Together they find David Shield inside some sort of vault. Inside the storage room, David manages to unlock a special block and sends Sam (David's assistant) to retrieve a special item. David swears to never let this device into the wrong hands and Sam replies that everything is according to plan. Melissa overhears the men talking about working with the villains. Melissa makes her father admit the truth, as he reveals he created a Quirk Amplification Device, but it was taken away and locked up by their sponsors. It was originally Sam's idea to hire fake villains to steal the research back for them. Izuku and Melissa are both horrified by this revelation and the latter demands to know why. David admits that he was doing this for All Might because his Quirk is disappearing. Izuku feels guilty knowing the truth of why All Might lost his power and now David is acting desperately on that. Angry, Melissa tells David that she and her friends risked their lives to save everyone, showing off a scar from Swordkil's attack on her arm. David admits to stealing his research back so he can restore All Might's powers. Confused, David says the villains were supposed to be fake. Wolfram makes a dramatic entrance and reveals that the only act was the villains pretending to be fake. Izuku tries to attack but Wolfram quickly restrains him using his metal manipulation quirk. Sam betrays David and brings the device to Wolfram. He claims that David turned his back on him when they never got paid for working so hard. Wolfram shoots Sam in the arm and acts like they never had an agreement. He shoots again but David jumps in the way of the bullet.

Wolfram steps on David's injured body and tells him to stop playing hero. He reminds David that his crime is real and that won't disappear with one good act. Wolfram claims David can't go on being a scientist anymore and knocks him out. He plans on using David to mass-produce the Quirk Amplification Device. Melissa pleads with the villains to return her father. Her cries fall on deaf ears and Wolfram threatens to eliminate her. Izuku breaks free from his bonds and attacks, only to be blocked by Wolfram's Quirk. Izuku tells Melissa that he'll save David but she needs to be the one to save everyone else. Melissa flees and the Hacker tries to follow. Izuku refuses to allow him to pass, forcing him to come to blows with Wolfram. Together, Melissa and Izuku manage to save everyone by disabling the security system. All of the drones return to normal mode and I-Island is set free from the grasp of the villains. Wolfram prepares to escape with David on a helicopter and Izuku pursues them. Melissa calls All Might to update him on the stakes. He promises to rescue Izuku and David. "Give the Professor back!" Izuku says. David asks that the villains kill him but Wolfram has other plans in mind. Izuku catches up to them on the roof and Wolfram asks if he's come to rescue a criminal. Izuku rushes toward his foes and cries out that he's going to rescue the professor. Izuku manages to evade most of Wolfram's attacks as he shouts "It's a hero's duty to rescue those in need." Wolfram turns his gun to David, forcing Izuku to stop, and then slams him with a metal pillar. He barrages Izuku with similar attacks and gets on the helicopter with David aboard. Izuku refuses to let the professor go and leaps high into the sky. He grabs on to the helicopter and tells the professor that Melissa is waiting for him. Wolfram tries to shoot Deku but the bullet is sent off course by a swift tackle from David. Deku crashes into the helipad below and laments letting the villains escape. All Might's voice reaches through the sky and reminds Deku to smile in situations like these. The Symbol of Peace leaps high above the helicopter and restores faith in everyone with his signature motto. "Everything is okay because I am here!". All Might returns to save the day. All Might soars through the helicopter, rescuing David and sending the villains to their fiery demise all in one motion. David tries to apologize to All Might but Wolfram abruptly appears from the smoldering remains of the crashed helicopter. He attacks them both with a metal pillar and traps David in a metal casing. Wolfram is using David's Quirk Amplification Device to boost his Quirk exponentially. The No. 1 Hero tries to silence the villain but Wolfram proves far more powerful than before. Wolfram uses his enhanced powers to transform the tower's roof into a scrap metal hell. Wolfram nearly crushes All Might under the weight of a steel barrage. Shoto and Katsuki prove a hero is never alone and come to his rescue. The other students join the fray, with Tenya and Eijiro taking on the metal pillars as well. Motivated by his student's passion, All Might goes beyond his limits and uses his awesome power to break through Wolfram's iron defenses. All For One secretly aided Wolfram's invasion to spite All Might. Just when it seems like the No. 1 Hero is gaining the upper hand, Wolfram traps him with metal wires and tries to crush his throat with a surprise Muscle Augmentation Quirk. All Might can't believe Wolfram has even more power and deduces that his most evil foe, All For One, must be behind this. When Wolfram was planning the invasion, All For One contacted him offering to help. All For One gave Wolfram this power and information on All Might because he wanted to help twist All Might's best friend to the darkness. All Might's smile fades from the shock of finding out his arch-nemesis has orchestrated the incident. Wolfram crushes All Might under a torrent of scrap metal. Izuku's instincts kick in and he breaks the iron prison apart in time to save his mentor. All Might scolds Izuku for being reckless with his Quirk. Izuku argues "A hero must act when people are in trouble." All Might's smile returns and he thanks his young successor. He asks that Izuku aid him in this final battle. Izuku arms his Full Cowl and places his faith in Melissa's Izuku's Support. Sensei and pupil race into the heat of battle, rushing pass an endless iron assault from their foe. Melissa watches as Izuku mirrors All Might's power and is moved to tears by their teamwork. Wolfram's last-ditch effort is forming his metal into a massive iron cube large enough to crush the tower. All Might and Deku go beyond their limits and break through the cube with a Double Detroit Smash! David and Melissa watch as the U.A. students cheer on their heroes to victory. All Might and Izuku chant the time long motto of U.A., "Plus Ultra", as they finish the villain off with twice the full might of One For All. At last, the heroes are victorious and the scrap metal hell disintegrates into dust, along with the Quirk Amplification Device and the Izuku's Support. As he regains consciousness, David sees the triumphant pose of Izuku, and sees a young All Might within him. Melissa checks on Izuku and All Might on David. David thanks All Might for saving him but All Might bestows the credit on their successors. They are the two heroes who saved the day. Reuniting, Melissa appreciates everything Izuku has done, while reminds her that her actions helped save everyone on this day, also apologizing for getting the Full Gauntlet destroyed. All Might tells David that Melissa explained the details of what happened. David admits that he was so afraid the Symbol of Peace would fade away and lead to the end of peace. David realizes now that he was just trying to hang on to the past and knows that Izuku and Melissa will protect the future and ensure peace to everyone. All Might says "Izuku isn't ready yet but he possesses the potential to be the greatest hero." David says he can feel the same light in Izuku that comes from All Might, the light of a hero.

Sometime later, Melissa visits her father in the hospital. They speak as he recovers from his injuries. The rest of Class 1-A join up together to take part in the I-Expo proper. By the end of the trip, Izuku and All Might meet up and stare at the city before leaving.