Agnes Bourdillon isn't the kind of woman you would expect to be a nun. She's attractive, stylish, and not naturally saintly. She is sent to a girls' boarding school in West Yorkshire to teach. It's hardly a place that one would expect to find a woman as disturbed as Joanna Baines. When the gardener is murdered the day after Joanna goes missing, it seems only Agnes can discover who is lying and why...