After escaping her fate as a cult sacrifice, Isabelle Barnes demands justice. When a court case hoping to convict her kidnappers fails, Isabelle feels completely betrayed – until a chance encounter with a secret humanitarian organization re-ignites her fragile faith in humanity.

However, when bodies start to drop with strange glass orbs burned into the victim’s mouths and uncanny marks link to a series of violent cold cases emerge, Isabelle knows the eldritch horrors are on the prowl. Isabelle partners with police officer Tommy Muldoon to put the clues together and ensure justice is actually served this time. As Tommy and Isabelle’s investigation unravels a sinister plot tangling together gangs and cults, ultimately revealing that evil within Arkham runs both deep and dark, something only a bullet can kill.