Lucas is a riftborn fighter bent on vengeance in this thrilling urban fantasy/detective noir series from the bestselling author of the Hellequin Chronicles.
 
The peace between the rift and humanity has always been tenuous. It's up to the Guilds to protect it, removing whomever—or whatever—poses a threat, whether human or rift-fused. Lucas Rurik used to be part of the Raven Guild. That is, until someone murdered all of its members—except for him.

That was seven years ago. Now, Lucas keeps to himself, avoiding getting too close to anyone lest they become targets themselves. But when one of his oldest friends at the Rift-Crime Unit calls upon him for help with a case that's already taken down people who mean a lot to him, Lucas can't resist stepping back into the fray.
 
Something is killing FBI and RCU agents alike—something unlike anything Lucas has ever seen before, on Earth or in the Rift. Even more concerning, the gruesome assaults seem to be linked to Dr. Callie Mitchell, a depraved and disturbed individual who treats the rift-fused like her own personal lab rats.
 
And when someone Lucas thought he could trust turns on him, he realizes these killings aren't just the random attacks of some terrifying new kind of fiend. They're connected to whoever killed off his Guild all those years ago—and that's something Lucas just can't let lie . . .