The crawlers are cavemen that never left the cave. They've evolved over thousands of years to become expert climbers who've lost their eyesight, have acute hearing and smell, and function perfectly in the pitch black. When a group of female friends gets trapped in a mountain cave due to a rock fall and infringe upon their world, the crawlers are simply defending their territory.
A relatively low-budget horror film that redefined the genre for hardcore fans in 2005, The Descent stands as one of the purest new concepts in horror in the last 10 years. With gore-laden special effects and fear around every corner, the film grossed over $25 million worldwide, surpassing its budget by over 300%! A passionate fan base has been "screaming bloody murder" for product since the film's release.