Following his success in the Provisional Hero License exam, Izuku Midoriya, also known as Deku, pursues an internship with a professional hero agency. With the guidance of All Might, Deku secures a placement under Sir Nighteye, a renowned hero and former sidekick of All Might. As Deku's classmates engage in diverse internships to enhance their skills, a formidable villain named Kai Chisaki, alias Overhaul, rises to power in the criminal world. Meanwhile, the clash of Chisaki's ambitions with the League of Villains, led by Tomura Shigaraki, sets the stage for a confrontation. Through his collaboration with Sir Nighteye, Deku uncovers Chisaki's criminal organization and his troubled association with a young girl named Eri. Worried for Eri's well-being, Deku and his fellow student Mirio Toogata unite their efforts to stop Chisaki's malevolent activities and protect the innocent.