Forensic pathologist Grace Reilly has seen her share of unusual deaths in rural Missouri. But when she begins to notice a pattern in autopsies of elderly residents whose reports say they all died naturally, she takes her concerns to Sheriff Nate Cox.
Nate is skeptical about the link Grace is seeing between the deaths--and her suspicions of foul play. Once she finally convinces him her theory is credible and they join forces to investigate. Exposing the truth could destroy several lives--including Grace's.