It didn't take long for the survivors in the cave to hear the noise.
The intermittent beating sound was like a drum beating in the heart, making people feel refreshed.
They were stunned for a moment, then slowly stood up from the ground and made a posture of listening.
At the same time, they looked at each other to see the reactions of the others to confirm whether they were mistaken.
When they found out that everyone had the same expression, it proved that there was nothing wrong with their ears. The first reaction of the survivors was disbelief.
After all, such a long time had passed. If the people outside wanted to rescue him, they would have already done so.
However, there was no movement before the disaster, which was enough to explain one thing.
The people outside were prepared to sacrifice them and seal the cave entrance for a long time to prevent the sea monster from rushing out.
