In this delightful mystery our heroine Kat Stanford stumbles upon a hidden room in an abandoned wing at Honeychurch Hall. However, Kat's initial excitement soon ends in horror. There, lying on the cold, stone floor, Kat comes across the body of a young woman dressed in an Egyptian toga and wearing a tawdry fairground trinket around her broken neck.

Suspicion falls on some of those who live at the Hall - both upstairs and down - and even those who are just had been passing through. Matters come to a head as a killer lurks amid the aristocracy...