Atlanta, 1939. Tough, beautiful private detective Violet Cambridge has been known to shoot first and ask questions later. But when a distraught client searching for her missing sister appeals to her for help, danger is the furthest thing from Violet's mind. Then her partner is murdered, hideously mutilated and Violet is thrust into a spiraling and - seemingly supernatural - chain of violence and death. The search for a legendary object said to possess unholy power is about to reach its mind-numbing climax... Beset by gangsters, secret societies, evil cultists, and the most infamous warlock of his time, Violet Cambridge and her small band of allies have quite literally stumbled into a case from hell...