It's a fine line between adoration and infatuation. While out riding one day Sister Joan stumbles across an old, ruined chapel in a lonely area of the moors. It looks abandoned, but it’s not empty. On one of the pews lies a man. From the smell, Joan guesses he’s been dead for some time. With Detective Alan Mill away, Joan goes to his deputy, but the police seem strangely reluctant to help. Meanwhile, a young woman turns up and begs Sister Joan to help find her missing sister. But the police are not interested in the missing woman either . . . It looks like it’s all down to Joan. But can she help her fellow man and stay out of trouble?