Years after the defeat of the league of villains, the alumni of Class 1A lead their lives as professional pro heroes. In particular, Izumi Yagi, daughter of All Might and the worlds current number 1 hero, is living her best life, not only as a hero, but as a mother to her daughter. Unfortunately, the past has a very terrible way of bringing it's ugly head out of the darkness, as during the celebration of her classmates wedding, she is shown a robot, one that the league had constructed years ago that hadn't been activated until now. The world will cower in fear upon hearing this machines name. They will bend to its will, and acknowledge him, as the one who challenged the symbol of peace. Ultron.