Set in a world where superpowers (called "Quirks") have become commonplace, Katsuki is training to be a hero. He has an explosion power and wants to use it to find his friend, Izuku. As the heroes storm the building, they are looking for a girl named Eri. No one has any idea there's another victim in the building. Katsuki has no idea what's waiting for him inside. He runs to keep up with the pros and hopes this mission goes well. We better find this girl soon.