When a trench appears overnight off the coast of New Zealand, it defies every law of geology-and every instinct meant to keep humanity safe from the deep.
Marine ecologist Daya Soren is pulled into a classified investigation where the ocean behaves like something wounded... and aware. As evidence surfaces of VirexCorp dumping experimental biological waste into the abyss, a horrifying truth emerges: the trench didn't just form-it responded.
What begins as environmental fallout spirals into something far more dangerous. Eyeless creatures rise from impossible depths. Signals pulse through the water, triggering visions, memory loss, and a growing sense of reverence among those exposed. And beneath it all, something vast begins to wake.
When a descent mission reveals a living structure buried within the Earth itself, the team realizes they haven't discovered a trench-
They've opened a mouth.
Now hunted by corporate assassins and bound to a piece of living abyss that recognizes her as part of its system, Daya must decide whether humanity can survive what it has summoned... or if the sea has already chosen to consume it.
The ocean is no longer empty.
It is listening.