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.
American novelist David Raybourne accidentally becomes entangled in the Red Brigade's terrorist plan to kidnap Italian Premier Aldo Moro during a research trip to Rome. As the terrorists attempt to kill David, he and his photojournalist friend must struggle to stay alive.
