Life and Death are at war. Their battleground is the walled Oklahoma city called Elysium, ruled by a coven of witches and inhabited by demons. Sal, a powerful witch, is named Successor... until she and a demon named Asa are exiled. To atone for their mistakes, they set out to put an end to the apocalypse. But to win will mean challenging the rules for a chance to beat Life and Death at their own game.

Born with an ability for magic, Miles Singer was either doomed to follow his family's interests or be admitted to a witch's asylum. Instead, he faked his own death and reinvented himself as a doctor. But when his witchmark is exposed while trying to save a poisoned patient, Miles's anonymity and freedom is at risk. Determined to solve the murder of his patient, he must return to the family fold....