Detectives Rob Ryan and Cassie Maddox, of the Dublin Murder Squad, investigate the murder of a young girl in Knocknaree, Ireland. It overlaps an open case from 20 years prior, that Detective Ryan had been involved in as a child victim. Keeping his personal involvement in the old case secret, is only one of the big mistakes that he self-admittedly makes during the course of the investigation. The use of language is masterful and captivating, however I found that the middle section of the story became a bit slow for a psychological thriller. Once the story turned toward a resolution it regained a better pace and surprised the reader with a dark and twisted ending. I look forward to reading more by Tana French.