Murder has brought Talon, Master of Guardians, as well as Zia, his witch and Master of Witches, to Chicago. The manner of death appears to be a suicide, but Talon is far from ready to close the case. To avenge the Guardian linked to his past, he agrees to take on the assignment, and find her killer.
As they dive deeper into the investigation, they find themselves entering a world where BDSM is the norm. A lifestyle that Zia is uncomfortable with and, rattled by this new development, she is more than ready to return to the Otherworld. But their investigation quickly takes an unexpected twist when they discover that they're not only hunting a killer but also someone who is controlling supernaturals in Chicago.
Their mission not only brings danger, but also forces Talon to deal with decades old guilt that corrodes his soul. Every event that unfolds only deepens his fight and pushes him to face an ultimate choice—what is more important—his duty to the Otherworld or the witch he holds closest to his heart?