Open Water is a 2003 drama psychological horror film loosely based on the true story of an American couple, Tom and Eileen Lonergan, who in 1998 went out with a scuba diving group, Outer Edge Dive Company, on the Great Barrier Reef, and were accidentally left behind because the dive-boat crew failed to take an accurate headcount. A sequel Open Water 2: Adrift had gone into production and released 2006. None of the original cast are scheduled to return, but will keep a similar plot as its predecessor, but an independent film.