Nobody knows what lies under the ocean’s surface. Divers are frequently unable to reach particular depths due to pressure or the accumulation of chemicals at the deepest layers of the sea. These circumstances might sometimes make it hard for any sort of life to thrive.
However, every now and again, a group of explorers is fortunate enough to reach hitherto unexplored depths. And what they see down there can be disturbing enough to make them regret ever venturing down there in the first place.