A legendary miner fights to keep Cobalt Coal from going belly up. Major mistakes by the Night Shift almost cost the company their livelihood while one of the deadliest jobs claims another victim.
With a failing power supply, Cobalt Coal struggles to keep its head above water. The situation turns deadly when a storm shuts down the mine's air supply, forcing every man into a desperate race.
A devastating storm smashes the Cobalt Mine causing power outages and equipment failure. Hank returns from the hospital to find his job on the line and the possibility of being sent to the house.
Cobalt owners Mike and Tom are facing financial ruin when they roll the dice with a risky belt move that pays off. With the mine half buried in coal, Mike pleads to the trucking company to rally.
Cobalt is forced to mine in the most dangerous part of the mountain; a reduced day crew faces the mountain alone.
The future of the company might be in jeopardy when a piece of equipment is damaged and a redhat steps in.
In the dramatic season finale, Mike and Tom work frantically to get the new lease approved as the mine starts to fall apart. The biggest rock fall yet leads to a fight so explosive it threatens to tear the company apart.