Jeju Island and Attack on Demon’s Cave (11)

She said that the Demon's Cave looked so much like Earth.

Sungwoo wondered what she meant by that, but he had to take care of something more important than solving the riddle now. The Black Lion finally sensed something.

He said, "I can feel it. I can feel a huge beating sound coming up from the underground. Periodic vibrations are spreading throughout this world."

"Where is it coming from?"

The Black Lion raised his left hand and pointed somewhere.

"It's coming from the west."

Given that it was a periodic beating sound, it was obviously coming from the Demon's Cave.

So, Sungwoo felt he could find some clues if he moved there.

"If we climb higher, I think we can get out of the sandstorm. What a relief!"

Like Kyungsoo said, they could escape from the thick sandstorm by raising the altitude of the Messenger airship higher than the building.

"Now, we're going to fly westward at full speed!"