The world became a superhuman society with about 80% of the populating possessing some uncanny ability. Meanwhile 20% of the population who didn't had supernatural power was called 'Quirkless' But rumor says, that a woman around her 20's had seen a child in Tokyo who was manipulating not one, but more quirks. After that, the little girl has mysteriously disappeared, this of course peaked up one of the most dangerous villain interest.