Sanctum

Sanctum (2011) plunges viewers into the South Pacific's Esa-ala Caves, where master diver Frank McGuire's expedition is suddenly imperilled by a flash flood, trapping him and his team—including 17-year-old son Josh and the anxious financier Carl Hurley—within an underwater labyrinth. With dwindling supplies and time running out, the group must adapt and find a way through treacherous waters to survive, transforming their mission from exploration to a desperate struggle for survival.