Colmán Sharkey, portrayed with considerable skill by Dónall Ó Héalai, shares a simple life with his wife and young son along Ireland’s western coast. They manage to sustain themselves through potato farming, fishing, and a small business producing poteen. Their precarious existence is further challenged by the arrival of Patsy, played by Dara Devaney, who is a naval deserter, and by a crop-destroying disease. This le…