Set on a remote island off the west coast of Ireland, the film follows longtime friends Pádraic (Colin Farrell) and Colm (Brendan Gleeson), who find themselves at a dead end when Colm unexpectedly ends their friendship.
Stunned Pádraic, with the help of his sister Siobhán (Kerry Condon) and troubled young islander Dominic (Barry Keoghan) tries to mend the relationship and refuses to take no for an answer. But Pádraic's efforts only strengthen his former friend's resolve and when Colm issues a desperate ultimatum, events quickly escalate with shocking consequences.
