Donegal 1846. The four upstanding sons of the Phelan family are torn between nonviolent protest and bloody revolt when the injustices of the landholding system and the onset of the potato blight combine to devastate their community. Though his predecessor was murdered, the new English landlord's agent, Captain Townsend (Michael Kitchen, Foyle's War), upholds the law while appealing to the absentee landowner for relief for the suffering tenants. Three of the Phelan sons try to work with Captain Townsend, but one takes the law into his own hands, setting off a chain of events that test the brothers' love for their country and each other.