After a tragic accident, six friends reunite for a caving expedition. Their adventure soon goes horribly wrong when a collapse traps them deep underground and they find themselves pursued by bloodthirsty creatures. As their friendships deteriorate, they find themselves in a desperate struggle to survive the creatures and each other.
|Production Companies||:||Celador Films,Pathé,Northmen Productions|
|HD||:||Includes 720p and 1080p.|