The Descent (2005)
overview : 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.
Genres : Adventure, Horror
Tags : mutant, expedition, cave, trauma, darkness, rope, climbing, appalachia, friends, female protagonist, best friend, survival horror, grieving