Based on the novel by Daphne du Maurier, this sweeping epic relates the tale of three generations of two Irish families caught in a relentless feud that first erupts in 1840 when the Brodricks open a copper mine on land belonging to the Donovans. Outsider Fanny Rose Flower (Margaret Lockwood) marries into the Brodrick clan and watches over the years as greed, betrayal, economic upheaval and class violence threaten to tear apart both families.