In the idyllic waters of the South Pacific lurks a dangerous and insatiable predator, a monster whose bloodlust and greed threatens the very survival of our planet.

Thousands of miles from the nearest human settlement, deep on the ocean floor, the creatures have lived for millennia. But when an oil drill bursts through their lair, Nøkken attacks, damaging the drilling ship’s engine, trapping the desperate crew.

The longer the humans remain in Nøkken’s territory, struggling to repair their ailing ship, the more confrontations occur between the two species. When the death toll rises, the crew turns on each other, and marine geologist Flora Duchovney realizes the scariest monsters aren’t below the surface.