Mingo County, West Virginia, 1920. Coal miners, struggling to form a union, are up against company operators and gun thugs; Black and Italian miners, brought in by the company to break the strike, are caught between the two forces. Union activist and ex-Wobbly Joe Kenehan, sent to help organize the union, determines to bring the local, Black, and Italian groups together. Drawn from an actual incident; the characters of Sid Hatfield, Cabell Testerman, C. E. Lively, and Few Clothes Johnson were based on real people.