A woman on the run is a Montana serial killer's ultimate target in this psychological thriller by the #1 New York Times bestselling author. In Grizzly Falls, Montana, Detectives Selena Alvarez and Regan Pescoli are struggling with a new acting commander while Sheriff Dan Grayson is in a coma after being shot. It's the worst possible time for a homicide. A woman's body has been found, frozen and missing a finger. Alvarez hopes this was an isolated case of a murderer with a personal grudge. But then a second body turns up. . .

Meanwhile, Anne-Marie Calderone has just arrived in town hoping Sheriff Grayson could help her escape a dangerous stalker. But now Grizzly Falls is starting to feel like a trap. As clues begin pointing toward a homicide suspect, Alvarez senses there's more to this case than others want to believe. A killer has made his way to Grizzly Falls, ready to fulfill a vengeance years in the making. Alvarez and Pescoli must find the target of his wrath—or die trying.