Even the Sanctum, by producer James Cameron, follows a team of cave sailors on a expedition into the least accessible and largest, most beautiful cave system on Earth. Every time a storm compels them deep into the caverns, then they must fight raging water, terror and deadly terrain since they hunt into the sea. Master diver Frank McGuire (Richard Roxburgh) has researched the South Pacific's Esa-ala Caves for many years. Nevertheless, while his exit is cut off in a flash flood, Frank's team--including 17-year-old son Josh (Rhys Wakefield) and also financier Carl Hurley (Ioan Gruffudd)--are driven to radically alter plans. With dwindling supplies, the crew must browse an labyrinth to create it out. They are faced with all the question: Can they survive, or can they're trapped?