Matthew Liu sees his parents gunned down on a lonely Sydney backstreet. A young woman, the killer, stares him in the face before fleeing the scene. When the police arrive, all they find is the discarded gun. Detective Inspector Paul Harrigan's unit is pitched into a high-profile investigation with little to go on. Who is the young woman? How can she have vanished into thin air? When DC Grace Riordan follows up a connection between one of the victims and a termination clinic, pieces start to fall into place, but Grace is forced to confront some personal demons. Harrigan has demons of his own to contend with. Burned badly in the past for refusing to turn a blind eye to police corruption, he suspects that his current team and investigation is being subtly sabotaged. Then he discovers that his own son is in email contact with the killer and that the young woman's bloody rampage is far from over. And with a single phone call the killer draws Harrigan and Grace into her trap.
