The hunters noticed the circling birds against the rose-tinted sky above the rim rock and saw where the flat rays of the early morning sun glinted on something that didn't belong there, and the three of them walked that way. What they find sends FBI agent Zack Tolliver and his friend Eagle Feather in pursuit of a dangerous and powerful killer. 

Old friend Marty O'Bannon, San Francisco Homicide Detective, calls FBI Agent Zack Tolliver early one morning for advice. O'Bannon is at the scene of a murder, the victim's throat ravaged as if by an animal, and no clues to the killer. He now has three particularly vicious unsolved murders, all with the same MO. It is just Zack's kind of case. Agent Tolliver agrees to assist, but a current case at the Navajo Indian Reservation prevents him from leaving.

Dela Alvaro is a disabled veteran who grew up on the Confederated Tribes of the Umatilla Reservation. When an IED in Iraq ended her military career, she came home to reassess her life and landed a job in security at the Indian run casino on the reservation. Not even a year into being the assistant to the head of security, Dela is promoted on a trial basis. When one of the casino employees is found stabbed and stuffed in a laundry chute, she knows she can kiss head of security goodbye if she doesn’t find the killer before the media gets hold of the story.

Lacey Fitzpatrick is an ex-LAPD detective with an axe to grind. Tainted by the betrayal of her drug-dealing cop boyfriend, she's on a quest to prove to herself - and the world - that she's still a competent crime-fighter. In order to do that, she teams up with Sam Firecloud, a half-Navajo man who communicates with ghosts. With his talent and her research, they tackle troubling unsolved crimes, but their latest case is the toughest. They have to solve a murder - where no record of a murder even exists.

Harney County, Oregon, 1968: Nick Drake has a chest full of medals and enough demons to fill a duffel bag. He's been trained to kill but was never retrained to rejoin society. Drake flees to the lonesome high desert in search of redemption and takes a job patrolling wildlife refuges where the only conflicts are keeping out stray cows and ticketing poachers. But then he stumbles across a girl's body ritually placed in a gully. Her murder is only the beginning, and Drake must face humanity's heart of darkness once again if he's to stop a killer from turning even more gullies into graves.