Set in a futuristic world where magic and esper powers exist side by side, a battle breaks out between people who seek to obtain Index and the people who seek to destroy her. Although Index has stores of texts about ancient and powerful magic in her mind, she needs attackers on her side to ward off the people after her.
All familiar characters such as Touma and Mikoto are here and there are more for you to unlock. Explore and break through the boundaries of your power, each character have their element, if you have read the novels or watched the anime, you might already have some idea. With this game, you get some hands-on experience.