Detective Constable Angus MacVicar has just landed his dream job - transferred out of uniform and assigned to Oldcastle's biggest ongoing murder investigation: Operation Telegram hunting the 'Fortnight Killer'. Every two weeks another couple is targeted. One victim is left at the scene their corpse used as a twisted message board. The second body is never seen again. This should be the perfect chance for Angus to prove himself but instead he's lumbered with the forensic psychologist from hell. A jetlagged sarcastic know-it-all American on loan from the FBI who seems determined to alienate everyone while dragging Angus into a shadowy world of conspiracies lies and violence. It's been twelve days since the Fortnight Killer last struck and the investigation's running out of time. The darkness is growing and if Angus isn't careful it'll swallow him whole. . .