A woman has been stabbed to death in her home, the husband is missing. A tragic case of domestic homicide is Detective Ella Marconi's initial theory. But as the investigation progresses, it also gets more complicated. Why is there no record of the absent suspect beyond a few years ago? Why has a teenager who worked for the pair disappeared too? Is trainee paramedic Aidan Simpson telling the truth about his involvement? As Ella begins to build a picture of the couples fractured, deceit - laden past, her personal life is deteriorating. But Ella knows she only has time for the job she loves, which in this case is taking her down a treacherous path...