Into the Abyss Chronicles

They say when you stare into the abyss, the abyss stares back at you. But what happens when you're the abyss... then what do you stare at? In the cave of Veryovkina lies a place called Krone. Krone is the abyss that claims all that enter. At +23,000 meters in depth, land is scarce and things are limited. So when a whole civilazation lives there, what hardships do they come across? At what lengths would our protagonist, a resident of Krone, come across to survive this harsh underground world? Maybe just shoot some one or escape the cave...?