In a world where science clarifies supernatural powers. In a huge college that has power development in its curriculum. To a resident high school student, Kamijou Touma, a pure white sister appears. She calls herself "Index" and says that sorcerers are chasing her. Thus, Kamijou Touma enters the world of the occult.
What should I say...
The fight scenes and the animations / realism is amazing, but I don't like really that every fourth / third minute there is a big fat plot twist. I don't want to spoil anything, but if you watch the anime yourself I think you will understand what I have just written.