In 1897, in Lota, Chile, in the face of long days, low pay, debts to the company store, unsafe and deadly working conditions, and widespread child labor, men try to establish a miners' association at one of the largest coal mines in the world. They must face Davis, an iron-fisted and murderous supervisor; there's at least one turncoat, willing to inform on their fellow workers; and, there are passions on all sides, including one between Fernando, a leader of the miners, and Virginia, the godchild of the mine's owners. Can the miners win a victory, and at what cost? Baldomero Lillo, a grocery clerk, records it all.