Wolf-Beast and ex-cop Lowell Kanaan recently brought his boyfriend, Elementalist and mystery author John Tilney, into the PI business with him. They've been solving cases for Boston's varied praeternatural communities ever since. So when a young Terran feels that the brutal murder of his Beast boyfriend isn't being treated seriously enough by the police, he brings the case to Kanaan & Tilney for a second opinion. Similarly defiled corpses pop up around Boston as they race to find the killer. All the victims are packless Beasts, like Lowell, and the vicious nature of the killings stir up old prejudices in the praeternatural community, Beast and otherwise. Throw a personal vendetta and some ugly family history for Lowell in the mix, and the trails are as muddy as ever. This case will test Kanaan & Tilney's strength, both as a PI team and a couple. It'll take all they have to keep each other alive—and stop a serial killer.