Chicago wizard and now a Warden of the White Council, Harry Dresden, gets called in by his friend Sgt. Karrin Murphy (she got demoted after helping Harry out in the last book) to look into a series of mysterious deaths. A lot of women have been found dead around Chicago, in what appears at first glance to be suicides, but Murphy and her team at Special Investigations can tell something is off, and Harry finds magically hidden writing that suggests the women have been killed because of their magical abilities.
As Harry begins to investigate, he starts to understand why he’s not heard anything about these mysterious disappearances before. A lot of the dead women were last seen with a tall man wearing a grey cloak (just like the Wardens wear!) and others with a thin, dark-haired, attractive man, fitting the description of Thomas Raith, White Court vampire and Harry’s half-brother. The fact that Thomas has been even more distant than usual lately and isn’t answering Harry’s calls isn’t helping.