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.
When Cecilia's abusive ex takes his own life and leaves her his fortune, she suspects his death was a hoax. As a series of coincidences turn lethal, Cecilia works to prove that she is being hunted by someone nobody can see.