For thousands of years after its development, mankind used the written word for communication between people and generations. As millenia passed and technology became more prevalent, writing - and thus, communication as a whole - diminished, until it could only be found on cell phones and computer screens. Seeing an opportunity, the sorcerer Sogan Kenzaki starts infecting words with the Nesta Virus, which brings them to life and turns them into monsters called MJBK (Menace of Japanese with Biological Kinetic energy). To counter this attack against humanity, an organization known as DEAVA (Division of EArth Verbalism Ability) assembles a group of youths with the ability of "Verbalism". They have to pilot the vector machines, which are used to form the mechas dubbed "Aquarions". The one wild card in the situation is the self-dubbed "savior", a young man who is the direct relative of a famous calligrapher, named Akira Kaibuki.

Academy City, Japan, is at the forefront of science. Besides being 30 years ahead of the world technologically, more than three-fourths of this peculiar city's population consists of students developing their psychic abilities as espers in various institutions. Among these students is Touma Kamijou, a high school boy with the lowest psychic rank of zero, but with a mysterious power no scientist can understand: "Imagine Breaker," which allows him to negate other supernatural abilities. This, however, doesn't affect Kamijou's life in the least as he plays his role as a regular teenager; that is, until he meets the strange Index Librorum Prohibitorum, a young girl who has memorized the entirety of the forbidden grimoires, and now a dangerous organization is hunting Index down. With several magicians looking to harm the girl, Kamijou will defend his new companion at all costs as he discovers a strange new realm of the supernatural. [Written by MAL Rewrite]

As tensions between the world of magic and Academy City continues to rise, Touma Kamijou and his hand of negation must face off against both esper and magician in order to protect the lives of those around him. Of course, he is not alone in his fight; whether by his side or out of sight, allies and enemies both old and new will enter the fray to help him. Toaru Majutsu no Index II continues the story of action and comedy, as the scale of Touma and his allies' battle grows ever larger. A conflict is slowly brewing on the horizon, and magic and science will cross paths once again in the war to come. [Written by MAL Rewrite]

Touma Kamijou can't catch a break. After the invasion of Academy City, political tensions continue to rise as both the science and magic factions collide head on. It appears that Academy City intends to declare war against the Roman Catholic Church, consequently plunging the whole world into global warfare. Touma soon finds himself on the front lines once again, striving to protect his friends and allies.

Toaru Majutsu no Index III serves as the last installment of the original franchise as Touma, Accelerator, and the true Level 0 Shiage Hamazura continue their separate journeys, leading up to the final act of the original light novel series.

[Written by MAL Rewrite]