In the dead of winter, homicide detective Alice Madison is sent to the remote town of Ludlow, Washington, to investigate an unspeakable crime. Together with her partner, detective sergeant Kevin Brown, and crime scene investigator Amy Sorensen, Madison must first understand the killer's motives, but the dark mountains that surround Ludlow are the perfect refuge for anyone trying to keep their secrets. And in this fourth outing (after Blood and Bone), when the cunning madman strikes again, the three Seattle police officers find themselves under siege.