Edward Carnby is a private investigator specializing in unexplainable supernatural phenomena. His cases delve into the dark corners of the world, searching for truth in the occult remnants of ancient civilizations. Now, the greatest mystery of his past is about to become the most dangerous case he has ever faced.

A top secret drilling platform in the Gulf of Mexico raises a dormant alien creature from the depths. Once loose, the creature goes on a murderous rampage.