A team of divers explores a system of caves deep beneath the surface of the Pacific Ocean. A freak storm leaves the explorers separated from their ship, leaving them with no choice but to journey deeper into the treacherous caverns in the hope of finding a way to the surface. Thriller, starring Richard Roxburgh and Ioan Gruffudd.

Master diver Frank McGuire has explored the South Pacific's Esa-ala Caves for months. But when his exit is cut off in a flash flood, Frank's team—including 17-year-old son Josh and financier Carl Hurley are forced to radically alter plans. With dwindling supplies, the crew must navigate an underwater labyrinth to make it out.