Directed by Neil Marshall | Starring: Natalie Mendoza, Shauna Macdonald, Craig Conway, Saskia Mulder

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.