A phone call from Bobbie Jo sets the unit in motion. Bobbie and Beth Dunlap have been taken hostage by men from death row. Cavanaugh is free and they are headed to the mountains. Bobbie is in premature labor and Shelly rushes to her aide, praying that she won't be too late. Who knew that an abandoned coal mine held so many secrets? With tunnels collapsing on either end, the only way out was up.