Underwater deep-sea miners encounter a Soviet wreck and bring back a dangerous cargo to their base on the ocean floor with horrifying results. The crew of the mining base must fight to survive against a genetic mutation that hunts them down one by one. Perched on the hull of a wrecked Soviet freighter, a team of deep-sea miners led by head oceanographer Steven Beck comes face to face with a mutant creature that's the product of a failed genetic experiment.