Three kilometers beneath the surface, something ancient has awakened.
Erebus-9 was supposed to be humanity's salvation—an underwater city offering escape from Earth's increasingly hostile environment. For journalist Soren Voss, it's simply where his sister Callie vanished while conducting research. But as Soren digs deeper into her disappearance, he discovers a terrifying truth: Erebus-9 wasn't built to save humanity. It was built to study something found in the abyss.
They call it "The Whisper"—a parasitic entity that spreads through the habitat's water systems, transforming those it touches into something no longer entirely human. The infection begins with whispers from empty rooms, strange patterns in the water, and shared dreams of spiraling darkness. It ends with perfect, chilling synchronicity as the transformed become extensions of a single expanding consciousness.
As the underwater city begins to collapse and corporate security tightens around him, Soren forms an uneasy alliance with the habitat's remaining uninfected residents. Together, they race to understand what they're facing and warn the surface world before The Whisper can escape the depths.