In a city balanced on a blade's edge between werewolves and vampires, lone-wolf P.I. Selene Fang hunts a predator snatching her kind from the shadows. The trail forces her into an unholy alliance with the one man she can't trust: Damien Valerius, a lethally charming vampire prince and the city's top detective. Together, they plunge into a conspiracy of forbidden science and blood-soaked black markets, only to find the rot reaches the very top of their warring clans. But the real enemy might be the forbidden, all-consuming fire igniting between them.