C203 Anterior abnormal sound

"Don't make a sound. Calm down and listen, there seems to be something coming from up ahead." Under Shi Yu's warning, the four of us squatted down close to the stone wall and listened carefully to the depths of the cave.

Phew. Phew.

In the depths of the cave, strange sounds gradually appeared. They were like short, rapid breaths, yet they were also like strange footsteps