When detective Petra Westman finds an unconscious child in an undergrowth, and shortly after stumbles upon the mother's dead body hidden inside a grit bin, the Hammarby Police team is shocked by the gruesomeness of this case. And the strangest thing is that nobody seems to be missing the victims . . .
But just as an investigation is launched, chief investigator Conny Sjøberg is faced with yet another murder. A teenage girl has been killed aboard cruise ship Cinderella and her younger sister will be next if Sjøberg can't uncover the killer.