Investigator Yannia Wilde is accused of murder as unseen battle lines are drawn across London, in this new fantasy mystery by the author of Wildest Hunger.

When a routine adultery case goes wrong, private investigator Yannia Wilde is arrested on suspicion of murder. Her friend Karrion takes the lead on the murder investigation, but nothing about the case is as it seems. Yannia and Karrion soon find that unknown enemies are conspiring against them, aided by a mysterious creature, called a Fey, with a thirst for revenge . . .

As the Winter Queen's influence over Yannia grows, the investigation leads once more to the Leeches of Old London. Tensions are flaring across the city while Yannia and Karrion delve deeper into the lives of those seeking to survive in a world that would see them exterminated. But as they investigate the shadows of a conspiracy, the vengeful Fey is one step ahead of them at every turn . . .