Dark Descent

Something is killing undersea miners in the Mariana Sea Basin. Officer Will Murdack (Dean Cain, "Lois & Clark") of the Deep Submersible Division is enlisted to investigate. Things are not what he expected at 35,000 feet below: 24-hour darkness, decompression sickness and a ticking clock of acute claustrophobia intensify the miners' growing rage. It's a race against time as the body count rises. Can Murdack save the lives of the miners and ultimately himself? (official distributor synopsis)