The story of My Hero Academia is set in a world where currently most of the human population has gained the ability to develop superpowers called "Quirks". Needless to say, society didn't handle it well and for years, things were thrown into chaos. But there was one sinister man who was able to rally people and went by a name based off of his own unique quirk, All for One. This man had the ability to steal and give away other quirks at will and over time, became the head of villains throughout.