The deepest regions of the Abyssal Trench remain unexplored.
The pressure exceeds the limits of most vehicles and diving equipment.
Every expedition that reached the deepest zones reported strange sensor readings.
Most records were classified.
Something exists at the bottom of the trench.
Something that emits signals.
Something that responds to sonar.
Something that may be connected to the ruins, the Leviathans, and perhaps even the destruction of the player's transport ship.
The question is not:
"What is down there?"
The question is:
"Who already knew it was there?"