They said the killings were the word of Satan. But Beatrice Scarlet, the apothecary's daughter, detects the hands of men. New Hampshire, 1756: the god-fearing farmers of Sutton are suffering divine punishment for unknown sins. Crops fail, cows die, and fish are poisoned by their water. Six pigs, slaughtered in their sty, bear the mark of the devils in their mouths. But to Beatrice Scarlet, the apothecary's daughter, the truth is much more chilling. Somewhere in this idyllic hamlet, a killer is hiding in plain sight. And if Beatrice does not unmask him soon, he'll be coming for her next.