No one knew Dr Sarah Fordyce was missing, until her husband's mutilated body is discovered in the family home, with a note nailed to his forehead, "Don't believe their lies!!!" Two weeks later, a city councillor disappears, and his murdered wife is found with the same words. Two weeks after that, it's a prominent local journalist who's vanished, his husband's corpse left as a twisted message board and the "Fortnight Killer" is the topic of daily headlines. Angus McVicar has only just made detective constable, and when he's assigned to the Major Inquiry Team hunting Oldcastle's newest serial killer it should be the perfect opportunity to prove himself. Only instead of being out on the front line, breaking the case, he's saddled with babysitting the forensic psychologist from hell, who's determined to drag him into a festering swamp of lies, delusions, and conspiracy theories. It's been twelve days since the Fortnight Killer last struck, and Angus is running out of time. But he's heading into darkness, and there are monsters lurking there.