After her brother's unexplained disappearance and the police abandoning the investigation, Yoruhime decides to seek the truth on her own.

Shortly after, she receives a call from an unknown person claiming to possess crucial information. To meet them, Yoruhime must travel to the United Kingdom.

It is during this journey that she notices the unthinkable: supernatural creatures live in the heart of the modern world.

They blend seamlessly into the population… while the rest of humanity seems unable to perceive their existence.

As she continues her investigation, Yoruhime finds herself confronted with a truth the world refuses to see.

Will she succeed in finding her missing brother and understanding the connection between his disappearance and these invisible monsters—even if it means exterminating them herself ?