An experienced rescue team composed by Dan, Greg and Cath is trying to locate the six women in the caves of the Appalachian Mountains. Meanwhile Sarah is found wounded, covered with blood, in shock and amnesic by a truck driver and brought to the Hyett County Hospital. Sheriff Vaines suspects that Sarah has killed her friends and forces her to return to the Boreham Caves together with his Deputy Rios and the rescue team. They search deeper and deeper in the caves but when Sarah recovers her memory, she panics and Sheriff Vaines shoots, provoking a cavein. The trapped group sooner faces the hunger and savage breed of predators while trying to find a way out.