When Sister Eve returns to the monastery, the last thing she expects there is murder. After solving several mysteries with her father at the Divine Private Detective Agency, Sister Eve finds herself torn between her calling as a nun and the thrill that comes with detecting. She knows she's been using her father's health as an excuse to extend her leave of absence from the monastery, but that excuse is running thin. She prays that a return visit to the monastery for a conference on the Blue Nun will help bring clarity to her calling, but when the conference speaker is murdered, Sister Eve's two worlds collide. Sister Eve knows the number one suspect, the victim's brother and monk in residence, couldn't possibly have committed the crime, and she's determined to find the real killer. To do so means she must track down some mysterious newly discovered writings from the Blue Nun, said to date from the 17th Century, when the sister bi-located to the New Mexico region from her home in Spain. Could these texts from long ago be the key to today's mystery? And will they offer any guidance to Sister Eve as she chooses which calling to follow?