A dark, intricate thriller with supernatural overtones, perfect for fans of S J Bolton, Andrew Miller and Michelle Paver. A man goes on the rampage in central London, killing several people in a seemingly random attack. One of the victims is researcher Jethro Durdage, whose sister Claudine witnesses the whole thing from the window of her office block. Riven by grief, Claudine retreats to the house in the Fens where she and Jethro grew up. As she starts to process what happened, Claudine begins to wonder what was affecting Jethro on the day of his death. He had been agitated, scared; had had something important to tell her, something secret... but what? Worse yet, the police believe that Jethro was not the victim but the orchestrator of the attack. Why would a gentle, kindly man want to cause such bloodshed - and why would he include himself in the list of victims? Claudine soons finds herself down a rabbit hole of mystery. Jethro's research into a medieval religious cult leads Claudine to a mysterious hidden chapel, and the more she investigates, the more she is troubled by the same unease and terror that had begun to plague her brother. The answers may lie in an obscure Biblical translation... but can Claudine solve the riddle in time before the darkness gets to her too?