DI Monica Kennedy's family day out comes to an end when a woman from her past shows up. With this reappearance hanging over her, Monica is called to investigate a chilling crime.

When a second body is discovered, Detective Kennedy begins to look for links between the two victims and comes to terms with the fact that they’re dealing with a serial killer.

When a clue to the next intended victim is found, DI Kennedy must battle to discover his whereabouts before it's too late. But it soon becomes clear the killer is playing with her.

After a third murder attempt fails, a new suspect emerges for DI Kennedy, and the return of a missing son sends shockwaves through his family.

Monica's investigation into the murders crosses into her personal life when the killer claims their latest victim.

After a murder close to home, Detective Kennedy is removed from the investigation. But a final act by the killer brings her right back into the centre of the case.