Niamh and Conor Ryan are the perfect power couple: smart, successful and beautiful, they have an enviable relationship and an the idyllic family life. But then the unthinkable happens. Their oldest son, Tom, is the victim of a hit-and-run. Detective Garda Cathy Connolly is part of the team investigating the incident. And as she delves deeper, she realises that all is not as it seems in the Ryan household, and that everyone connected to the case has their own reasons for hiding things from the police.