The students at St. Etheldreda's School for Young Ladies are there to learn to behave as proper maidens should. The girls' lives are mundane under the care of their miserly headmistress. But despite their dreary situation at school, there is one fate that all the girls agree would be far worse. And that is being sent home.
So when their headmistress and her brother drop dead at Sunday dinner, the young ladies decide to bury the bodies in the back garden and keep the murders a secret. Thus is born The Scandalous Sisterhood of Prickwillow Place.