2031. A mysterious new app has turned Tokyo from a broken city into a battlefield.

The Demon App can allow anyone to summon forces beyond human understanding. Many use this power to strike back at a world that has abandoned them.

In response, the Special Security Unit was formed, wielding the same technology to suppress these terrorists. Among them is Naoki Nakajima, the ideal high school student.

But as the attacks escalate, Naoki begins to realize the truth behind them. That this isn't just random chaos.

It's a movement.