Sister Margaret Ann Pahl was a nun that belonged to the Sisters of Mercy, a Catholic religious order for women. Pahl was found murdered in the sacristy of the chapel in the hospital where she worked. She had been stabbed 31 times, nine of those times created the shape of an inverted cross. She was also believed to have been sexually assaulted. At the time of her death, she was 71 years old. The priest in charge of the chapel and ministry to those in the hospital said her funeral mass. He was questioned in the murder, and later arrested for the murder. This book details the murder of Pahl and the investigation of Father Gerald Robinson.

Overall, this was a really interesting book. It was well written, and the research was on par. I am a pretty good fan of John Glatt books, so I expected to like this one. I was not disappointed in it. I am disappointed in religious people. Organized religion is not my thing by any stretch of the imagination, and it's always people like this that you are supposed to respect and listen to. No, thank you. They get up to too much nonsense and then try to defend the people who are out here abusing children and killing nuns. Hard pass for me.