Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.

• Celador Films
• Pathé
• Shauna Macdonald
• Natalie Mendoza
• Gavan O'Herlihy
• Josh Dallas
• Anna Skellern
• Saskia Mulder
• Douglas Hodge
• Krysten Cummings