When a violent hurricane traps a small crew aboard an oilrig they are forced to ride out the storm. Surrounded by nothing but high-speed winds and raging waters, their communication is severed off and they are left alone in the middle of the ocean. Unbeknownst to them their deep sea drilling has disturbed something very deadly. Crewmembers begin to disappear. As an extensive search proves futile, they discover that they are being hunted one by one by a vicious creature. Surviving the storm becomes the least of their worries.