A scuba-diving expedition in New Guinea goes terribly wrong when disaster strikes the team inside a claustrophobic maze of caves. Can the leader (Richard Roxburgh) keep his wits about him in the perilous darkness and get those remaining alive back to the surface? Co-produced by James Cameron and based on a true story, this gripping undersea thriller co-stars Rhys Wakefield, Ioan Gruffudd, and Alice Parkinson. 109 min. Widescreen (Enhanced); Soundtrack: English; Subtitles: English (SDH.