Ireland, 1970s. Eager to leave his dark past behind, Finbar Murphy (Liam Neeson) leads a quiet life in the remote coastal town of Glencolmcille, far from the violence that grips the rest of the country, when a menacing crew of insurgents arrive led by a ruthless woman named Doireann (Kerry Condon). Drawn into an increasingly vicious game of cat and mouse, Finbar must choose between exposing his secret identity or defending his friends and neighbors.