In the vast untamed desert of northern Arizona, Aideen Connor signs on as lead archaeologist hoping to find peace after witnessing her husband's violent death. Instead, she stumbles into a mystery as ancient and dangerous as the land itself. Aideen's team uncovers a "bone hash," human bones showing evidence of prehistoric cannibalism. Then a brutal murder shocks the residents of the nearby Hopi Reservation. Unsettling connections emerge between the murder and her dig, and Aideen's world begins to unravel.

Aideen's boss blames her when the bone hash is stolen. Violent threats begin: A sheep is viciously killed under her residential trailer, a photo of her dead husband left in its blood. A hulky stranger chases her across remote backcountry and attacks her. All threats point to a grim reality: someone wants her gone. Aideen must navigate a maze of buried truths with only her dog, Dakota for companionship. Every clue leads her closer to the secrets buried at her dig that could cost her more than her career—they could cost her life.