With the defeat of the Impure King, the Exwires have returned to their routine lives back at True Cross Academy--but the routine doesn't last for long! Halfway around the world, a strange encounter in the desert is the harbinger of evil things to come. An upturn in supernatural incidents at the academy involves Rin and his friends, but their seemingly simple tasks are about to draw them into a far larger conspiracy.

Rin and his friends continue to investigate the Seven School Mysteries. Yukio watches as the Exwires take on the Academy’s ghosts, troubled by lingering doubts about his own feelings. Rin seems to be learning to control his power more, but is tapping his inner demonic fire going to be his salvation or his doom?

As the True Cross Academy festival reaches its peak, trouble is brewing. While Izumo confronts Nemu Takara, Rin and the rest of the Exwires race to find her. The betrayal they discover and the tragic details of Izumo’s past will shake them to the core and herald the beginning of an all-out war between the Illuminati and the Knights of the True Cross!

The Exwires learn the tragic story of what happened to Izumo’s mother, Tamamo, when the Illuminati’s mad Professor Gedoin sought her out in order to conduct his insane experiments. Now Izumo has been captured and is next on the professor’s list of test subjects. Rin, Yukio, Shiemi, Suguro and Konekomaru head deep into Dream Town Inari to rescue Izumo, but what they find there is a horror none of them ever expected…