Daichi and Hibiki are two high-school friends on the verge of graduation. The latest rumor to go around their school: Nicaea, a "dead face delivery site" that supposedly sends photos of one's friends at the time of their death. When Daichi and Hibiki suddenly meet their own untimely end, they are mysteriously revived by Nicaea and thrust headlong into a long-brewing battle between human and demonkind. Now, armed with Demon Summoning apps and accompanied by fellow student Io Nitta, they must fend off a series of demonic attacks that are targeting the heart of Tokyo.
Three friends are thrust into a war they never asked to be a part of, wielding demons that they summon through their cell phones to battle the invading Septentrione, with the entire world at stake.
Daichi, Hibiki and Io are transferred from Tokyo to the JP's Osaka Main Bureau. There, they encounter Hinako and Keita, two recently recruited Summoners. No sooner has the trio arrived than Osaka finds itself under a massive attack, one that combines hacker knowhow with mystical energies.
In Osaka, Hibiki struggles with his inability to save Keita from perishing in battle. Meanwhile, with Osaka's spiritual defenses down, an ultra-powerful enemy named Merak has manifested and is making short work of all who would oppose it. Hibiki is placed on standby but races off, intent on protecting the others from harm. But his actions will have unforeseen consequences as Io is ordered into the fray, and Hibiki comes face-to-face with Ronaldo, an en enigmatic figure from JP's past.
At JP's Tokyo Branch, Prof. Kanno works to rebuild their Terminal technology from scratch as the threat of renewed Septentrion attack looms. Elsewhere, Io and Daichi arrive in Nagoya in search of Hibiki, and soon find themselves drawn into the band of insurgents that has recently waged war against JP's.
Io and Daichi are reunited with Hibiki in Nagoya, just as the next Septentrion is due to attack. Much to everyone's surprise, the assault comes not in their general area but directly atop them! The three friends find themselves joining forces with Airi and Jungo, two survivors and former JP's members with an axe to grind against Ronaldo and his band of insurgents. Regardless of background, all will join together to combat the Septentrion threat, until an unexpected ally arrives to turn the tide of battle!
Hiroshi Kamiya
HIbiki Kuze
Nobuhiko Okamoto
Daichi Shijima
Aya Uchida
Io Nitta
Mitsuaki Madono
Joe / Yuzuru Akie
Fuuko Saito
Keita Wakui