Her brain was filled with ...

The guards, who had been brainwashed by suspicious doctrines, might not be afraid of tangible things. Even if the FBI Special Forces came, they would dare to fight with real guns and bullets. However, as long as they were theists, they would be afraid of something, especially ghosts and demons.

They were scared out of their wits by Sihwa's ethereal yet heart-wrenching song, and their heavy breathing sounded like that of an old man who was about to die.

The firm atheists often could not understand such fear. They might be afraid when they heard a Midnight Song, but they would not be afraid to this extent, because the people they were afraid of were not ghosts.

"Don't panic! Someone must be up to no good!"

The leader of the guards forced himself to calm down and shouted to the others.