Something is wrong with the souls of Chicago's dead. Ghosts are walking the streets, and Agent of Death Madeline Black's exasperating boss wants her to figure out why. And while work is bad enough, Maddy has a plethora of personal problems too. Now that Gabriel has been assigned as her thrall, their relationship has hit an impasse. At least her sleazy ex-fiance Nathaniel is out of the picture--or so she thinks...

Madeline Black is an Agent of death, meaning she escorts the souls of people who have died to the afterlife. Of course, not everyone is happy to see her...

If obstinate dead people were all that Maddy had to worry about, life would be much easier. But the best-laid plans of Agents and fallen angels often go awry. Deaths are occurring contrary to the natural order, Maddy's being stalked by foes inside and outside of her family, and her two loves-her bodyguard, Gabriel, and her doughnut-loving gargoyle, Beezle-have disappeared. But because Maddy is Lucifer's granddaughter, things are expected of her, things like delicate diplomatic missions to other realms.

Excorting souls into the afterlife leaves Maddy little time for socializing-until devilishly handsome Gabriel Angeloscurro agrees to rent the empty apartment in her building. But when demons start appearing on Maddy's front lawn, she realizes there's more to her new tenant than meets the eye.