The shocking murder of a heavily pregnant woman throws the New Zealand city of Dunedin into a tailspin, and the devastating crime feels uncomfortably close to home for Detective Sam Shephard as she counts down the days to her own maternity leave. Confined to a desk job in the department, Sam must find the missing link between this brutal crime and a string of cases involving mothers and children in the past. As the pieces start to come together, and the realisation dawns that the killer's actions are escalating, drastic measures must be taken to prevent more tragedy. For Sam, the case becomes personal when it becomes increasingly clear that no one is safe - and the clock is ticking . . .