For decades, the unsolved murder of Father Michael Leary has haunted Billings, Montana. Who summoned the priest late one night, then left his body in a gully? Having admired Leary in her youth, Lindsay Keller became a prosecutor—until a devastating case prompted her to seek out a desk job. Now Lindsay finds herself in possession of the priest's wallet, the photo of a young girl tucked inside. Reluctantly teaming up with Boston detective Brian Donovan, Lindsay may find answers that could rock the community to its very core.