Three men spend six days in complete darkness fighting to find the exit of a treacherous cave system buried deep underneath the Ozark Mountains. Isolation, hallucination, dangerous accidents, and hordes of snakes complicate the mission.

240-feet below ground lies an abandoned Cold War fallout shelter deep in the Mojave Desert. For 6 days a Marine Reserve, Navy Survival Instructor, and an Engineer battle isolation, hallucination, and starvation as they struggle to find an escape.