A mother seeking solace with her two teenage children after a recent tragedy signs up for a group hiking and camping tour. But navigating the difficult terrain is the least of the hikers’ worries as the group soon finds they’re being stalked by unseen predators.
Inside the maze of caves, the hikers attempt to located Debbie without attracting the attention of the predators. Debbie manages to escape her bonds and finds them first, but not without the entire lair alerted to the infiltration. The group attempts to flee as the horde of attackers descend – only one side is going to make it out alive.
With their numbers dwindling, Debbie still captive, and no way to get help, Pamela and the hikers attempt to turn the tables on their attackers, tracking them back to their labyrinthine lair. They must find a way to get inside… before Debbie runs out of time.
The group is scattered in the face of the advancing threat. Pamela and her remaining kids load up, ready to fight, while Debbie works to free herself from her brutal captors. As a huge group of the predators charge towards Pamela and the hikers, a glimmer of hope arrives from an unexpected source.