Life is rough in the coal mines of 1876 Pennsylvania. A secret group of Irish immigrant miners, known as the Molly Maguires, fights against the cruelty of the mining company with sabotage and murder. A detective, also an Irish emigrant, is hired to infiltrate the group and report on its members. But on which side do his sympathies lie?

Director: Martin Ritt

Writer: Arthur H. Lewis, Walter Bernstein

Actors: Sean Connery, Richard Harris, Samantha Eggar

Production: N/A