A modern day Irish gangland version of the ancient Irish legend of Diarmuid and Gráinne. Gráinne is daughter of a major crime boss and is promised to marry the great warrior Fionn to help cement an alliance. However, she's in love with Fionn's most loyal comrade Diarmuid and her actions set off a wild chase across the country.

Father Eion O'Donnell is unambiguous about the need to use violence to force Britain out of Ireland. He influences a young impressionable boy, Antaine to fight in the 1916 Rising. Fifty years later Antaine arrives in Derry as an experienced gunman. This appearance throws Eoin back to the cause of his breakdown in 1916. Eoin's influence on young Antaine echoes in Antaine's dark influence on an Altar boy, Feidhlim.

Ireland, 1845 on the eve of The Great Hunger. Colmán Sharkey, a fisherman, a father, a husband, takes in a stranger at the behest of a local priest. Patsy, a former soldier in the Napoleonic wars arrives just ahead of 'the blight,' a disease that eventually wipes out the country's potato crop, contributing to the death and displacement of millions. As the crops rot in the fields, Colmán, his brother and Patsy travel to the English Landlord's house to request a stay on rent increases that Colmán predicts will destroy his community. His request falls deaf ears and Patsy's subsequent actions set Colmán on a path that will take him to the edge of survival, and sanity. It is only upon encountering an abandoned young girl that Colmán's resolve is lifted. Just in time for the darkness of his past to pay another visit.