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This is not the 1919 Swedish picture, but an adaptation of Frances Hodgson Burnett's novel, That Lass o' Lowrie's. It takes place in the English coal mines of the 1870s and revolves around Joan Lowrie (Priscilla Dean), who works as a pit girl. Fergus Derrick (Robert Ellis) is the son of the mine's owner, but instead of leading an idle life, he prefers to actually work in the mines himself. Joan's cruel father Dan (Wallace Beery) also works in the mines, and he often beats his daughter, who has inherited his strength of will but not his temper. Although Derrick has fallen in love with Joan, he is compelled to fire Lowrie. Lowrie leaves town, and Joan is finally able to relax and enjoy her life and Derrick. But her father returns, bent on revenge, and goes into the mines to kill his former employer. He lights a cigarette, causing an explosion, but Joan doesn't think twice about braving the flames to rescue her lover. Derrick in turn throws away any class-conscious concerns and unites with Joan for good.