Thomasine is a timid "holy" novice. All the sisters believe her to be saintly. She wiles away her time waiting impatiently for the time she could become a full fledge nun. Thomasine's world is turned upside down when her aunt arrives unexpectedly. Thomasine dreads this visit, in which her aunt makes a point in teasing Thomasine mercilessly by threatening to take her out of the nunnery and married to a lustly fellow--something Thomasine is deathly in fear of. After only a few days after arrival, her aunt becomes ill and then dies. Unfortunately, she's poisoned and Thomasine is the number one suspect. Its then up to Sister Frevisse to solve the mystery and find out who did the horrible deed.This is an interesting mystery. I gave it only four stars because I guessed who did it immediately, although I didn't know why. It was worth reading to find out why.