“Donnelly” (Brendan Gleeson) isn’t having a good day. He has just left his deceased wife in hospital and is getting the train home when he sits across from a young lad (Rúaidhri Conroy) who’s a bit free with his language and is, as my gran used to say, a little pass remarkable. His targets are a couple who board at the next stop and who don’t look very happy. It turns out that she (Aisling O’Sullivan) and her husband (David Wilmot) have had some fairly traumatic news of their own, and swiftly the smart-mouthed kid’s provocative comments lead to the first of a couple of tragic events on a…