Without caring for Xia Nan and someone else standing nearby, they sprinted towards the direction of the sound.
"Don't rush, I remember the way back, let's follow slowly."
In hesitation, Wood already patted Xia Nan's shoulder and followed along.
The control over their pace was exceptionally skillful.
While maintaining a clear view of Iron Head's every move ahead, they also kept a safe distance for the two to retreat if needed.
Having said this, Xia Nan couldn't possibly stay alone in the dangerous, dimly lit sewer, and quickly followed.
...
As they gradually approached, the once vague and echoing sound between the corridor walls became clearer.
It was a grand noise formed by countless sharp and piercing "squeaks" overlapping, causing a buzz in the eardrums and a tingling sensation on the scalp.
It seemed as if even the air, filled with humidity, vibrated along with it, stirring ripples on the surface of several filthy puddles on the ground.
