A crew of oceanic researchers working for a deep sea drilling company try to get to safety after a mysterious earthquake devastates their deepwater research and drilling facility located at the bottom of the Mariana Trench.
An unknown, massive earthquake happens in a drilling station in the bottom of the Marianna Trench.
A scientific crew must find their way across the ocean floor into another station under the threats of deep pressure, dark water, dangerous deep-sea creatures, and a constant lack of oxygen.