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.

Cast:Shauna Macdonald, Natalie Mendoza, Alex Reid, MyAnna Buring, Saskia Mulder, Nora-Jane Noone,

Genre:Adventure, Horror,

country:United Kingdom,

Production:Celador Films, Northmen Productions, Pathe,