Three strangers enter an abandoned silver mine in the Mojave desert in complete darkness. Will they find one another and a way out of the dangerous 150 miles of tunnel before succumbing to the psychological effects of light deprivation?
For six days, a Marine Reserve, a Navy survival instructor and an engineer battle isolation, hallucination and starvation as they struggle to escape an abandoned Cold War fallout shelter 240 feet underground in California's Mojave Desert.