Set on a remote island off the west coast of Ireland, we follow lifelong friends Padraic (Colin Farrell) and Colm (Brendan Gleeson), who find themselves at an impasse when Colm unexpectedly puts an end to their friendship.

A stunned Padraic, aided by his sister Siobhan (Kerry Condon) and troubled young islander Dominic (Barry Keoghan), endeavours to repair the relationship, refusing to take no for an answer.

But Padraic's repeated efforts only strengthen his former friend's resolve and when Colm delivers a desperate ultimatum, events swiftly escalate, with shocking consequences.

Brendan Gleeson and Kerry Condon both won Oscars for their performances in this film.