Our Lady of Hope Monastery can't catch a break. Situated in rural New Mexico, the cloistered monastery squeaks by on donations and various craft and skilled jobs suited to their cloistered, contemplative life. But when a stolen SUV crashes through their outside walls, they're faced with financial demands that far exceed their means. So when a major donor offers a great deal of money for what seems a simple task, they are quick to accept. John Gutierrez is very ill and desperately searching for his estranged niece, believed to be in the area. Having heard of Sister Agatha, the extern nun with investigative skills, he turns to the monastery for help. All Sister Agatha has to do is track down the woman and the monastery's financial worries will be over.
But nothing's ever as simple as it seems. Sister Agatha's investigation quickly lands her in the midst of a lethal game of cat and mouse and it's up to her to uncover the truth before the death toll rises.