When the daughter of a country parson goes missing in London, Roger Sheringham receives a letter from her father pleading for help. As the amateur sleuth investigates, he discovers that the girl is already dead, found hanging from a door by her own silk stocking. It is presumed suicide, but when more young women are found dead in the same manner, questions arise. Was it merely copycat suicide, or will the case lead Sheringham into a maze of murder?