Inspired by true events, the plot takes place in 1950 and revolves around Mr. Caufield, the owner of a coal mine. During Christmas, there are several explosions. His employees worry about their health and decide to strike, without any luck. One of the miners, Johnny, is determined to improve the working conditions and wants the other miners to have a great holiday. However, this goes terribly wrong when they are trapped underground following an explosion. Their families are desperate to save them, worrying there might be an even bigger and deadlier explosion.