The underground river, dark as ink, widened significantly. An artificial dam was constructed to intercept the water flow, forming a lake with depths unknown. The path ahead was pitch-black, resembling the gates to hell. Suddenly, the sound of rushing water startled everyone, making them turn their heads. It turned out that water was flowing from an inconspicuous spot downstream of the dam, making a loud noise, but it soon stopped again.
Luo Zheng walked over in surprise to discover a drainage channel. Observing the flowing water, he noticed it was obviously murky domestic wastewater. Witnessing this, Luo Zheng couldn't help but smile and asked Cao Xi, "The lake water is probably intercepted by the Sam Country Military, so it's clear. This is a drainage outlet, which is why the downstream water is murky. But, how can we be sure which way leads to the Dark Prison and which to the base?"
