Sister Joan receives a photograph through the post of her class at art school twenty years ago. This reminds her of an agreement she had with her classmates that they would get together at Westminster Abbey twenty years from the date of the photograph. Mother Dorothy allows Sister Joan to attend the reunion in the hope that she can also publicise the retreats which the convent is about to start hosting in an attempt to boost their failing finances.
The reunion is rather disappointing - as such events often are. Three people are missing - two of them killed in the last couple of years in accidents and a third recently dead of a suspected overdose. When the surviving members of the class attend a retreat at the Order of the Daughters of Compassion Sister Joan is put in charge of them. There will be many frightening events which yet again involve the convent in crime before all is resolved.
I find this entertaining series compulsive reading and I like the religious background which gives an insight into convent life - albeit of a fictitious kind. I like the series characters too - DS Alan Mill, who is gradually starting to understand convent rules; Alice the would be guard dog; Mother Dorothy who sees more than her nuns give her credit for; and Sister Gabriella who believes that age gives her the right to speak her mind.
If you enjoy crime stories with an interesting background and likeable characters then try this one. The series can be read in any order but if you read them in the order in which they are published it is easier to understand the development of the series characters. The first book in the series is A Vow of Silence