Having passed his Provisional Hero License exam with flying colors, Izuku "Deku" Midoriya is on the lookout for an extracurricular internship with a professional hero agency. With a referral from his mentor All Might, Midoriya secures a position as an intern under Sir Nighteye, All Might's previous sidekick, who has now carved a niche for himself as a renowned hero. As Midoriya's classmates continue to hone their abilities by taking part in different internships, an up-and-coming villain, Kai Chisaki, exploits his formidable powers to establish his influence in the underworld. Dubbed Overhaul, Chisaki's ambitions clash with the League of Villains and its head honcho, Tomura Shigaraki. While working with Sir Nighteye, Midoriya uncovers Chisaki's criminal organization and the precarious predicament of a young girl called Eri, who he shares a strained relationship with. Concerned for the girl's welfare, Midoriya and his senior Mirio Toogata must collaborate to put an end to Chisaki's tyrannical rule.