When a young woman is found dead on her bed, dressed in an old-fashioned nightgown with her hands clasped in a prayer position, Detective Kate Murphy is called to investigate her murder.
Before Kate and her colleagues can find the killer, another woman is found dead in the same position. Other than being Catholic, having blonde hair, and living in Boston, the women have very little in common. But one thing is clear: the serial killer has some twisted religious beliefs.
What is his motive? Who is he? And, most importantly, can Kate stop the murderer before he strikes again?