Following her widely acclaimed, New York Times bestselling debut, Ruth Downie sends beleaguered army doctor Gaius Petrius Ruso to the uncivilized borders of the Roman Empire, where the Roman-controlled Britannia meets the independent tribes of the north. Ruso, unwillingly pulled into the murder investigation, is appalled to find that his slave T illa is spending time with the prime suspect. Soon both Ruso’s and Tilla’s lives are in jeopardy, as is the future of their burgeoning romance.