Orla and Conor Quinn 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. What was Tom doing out walking so late at night? Is it a coincidence that his friend, Lauren, committed suicide nearby – or is there something more sinister going on? Detective Garda Cathy Connolly is part of the team investigating both incidents. As she delves deeper, she realises that all is not what it seems in the Quinn household and that everyone connected to both cases have their own reasons for hiding things from the police.