Running Time: 89 mins.
MPAA Rating: None
At a coal mine in a blue-collar town it's the last day of work for veteran miner George Marsh. His daughter Samantha, a feisty environmental lawyer whose politics are bitterly opposed by her father, celebrates the occasion by accompanying him underground. She's escorted by old flame Randy Bennings; no sooner do they descend to the coal face, however, than a drilling machine malfunctions and punches through a supporting wall. A cave-in kills several workers and several others go missing. The crew foreman, Mundy, is grievously injured. The shocked survivors retreat to a claustrophobic rescue chamber. While they wait for surface workers to reach them they hear terrifying, almost-human sounds f...