A fateful exchange on a flight from New York to Ireland has complicated consequences for Daniel Murphy (Michiel Huisman). He's left in charge of a corpse, the body of someone he never knew. He is persuaded to take on the challenge of getting an environmentally-friendly cardboard coffin from his family home in Clonakilty to Rathlin Island by his autistic younger brother Louis (Samuel Bottomley) and Mary (Niamh Algar), a flighty young mortician with her own agenda.