The Descent editor Jon Harris makes the leap to the director's chair in this sequel to Neil Marshall's claustrophobic 2005 creature flick. Sarah Carter (Shauna MacDonald) has managed to escape from the Appalachian cave system where all of her friends were killed by "crawlers" -- primordial humanoids who have adapted to living in the subterranean darkness. In hopes that some of the spelunkers may have survived, Sheriff Redmond Vaines rounds up his deputies for a rescue mission, and decides to take Sarah along as a guide. At first Sarah has no memory of the horrors that wait below, but the further the team pushes into the cave, the more vivid her flashbacks become until the reality of the situation sinks in. Now, the rescue crew is being hunted from the shadows by a whole new clan of crawlers that are even more vicious and terrifying than their predecessors. Sarah was lucky to make it out of the caves alive the first time -- will that luck carry over into her second descent, or is she doomed to die while dreaming of escaping into the sunlight?