Inspector Martin Aitken's life is a mess. He's divorced, his career's in chaos, and the last thing he needs this Christmas Eve is a strange woman collapsed on a Dublin street. Ellen Donnelly is a woman on a mission, coming to Ireland to find her mother and escape her marriage. Dr Milton Amery, a New York plastic surgeon, is her unfaithful husband. The three are beginning new journeys, each of which lead to Inishowen.