Following a horrible accident, a group of women who have enjoyed thrill-seeking adventures together in the past embark on a spelunking trek. A cave-in and poor planning are not the least of the horrors they encounter underground.

The first half of this movie, with the tensions within the group, the one-upmanship played out in deadly circumstances, and the challenges of battling each other and the caves, was scary enough; I’m a big fan of NPS and Appalachian Mountain Club accident reports, and this was a set up for the worst possible trip assessment in the history of trip assessments. Indeed, I found the troglodytes to be a little over the top and wholly unnecessary, though they did provide some pretty serious scares despite being unevenly powered, sometimes fearsome and other times easily knocked around. Darkness and tight spaces and idiot friends are scary enough.