The film will focus on underwater cave divers' efforts to survive after their expedition to the cave is ruined by a tropical storm. Forced to go deep into the caverns, they must fight raging water, deadly terrain and creeping panic as they search for an unknown escape route to the sea.
Alister Grierson serves as a director for "Sanctum" with a script provided by Andrew Wight and John Garvin. Richard Roxburgh, Alice Parkinson, Ioan Gruffudd and Rhys Wakefield are among the cast ensemble of the adventure thriller, which is due February 4, 2011 in the U.S.