Suzanne Crawford is found stabbed to death and her husband Connor is discovered to be missing, it looks like just another tragic case of domestic violence to Detective Ella Marconi. But as the investigation progresses, it becomes clear that all is not as it seems. Why is there no record of Connor Crawford beyond a few years ago? Why has a teenager who worked for the pair gone missing too? Is trainee paramedic Aidan Simpson telling the truth about his involvement? And above all, what was the secret Suzanne knew Connor was keeping at all costs - even from her?