When the 1920s' most glamorous lady detective, the Honourable Miss Phryne Fisher, arranges to go to Ballarat for the week, she eschews the excitement of her red Hispano-Suiza racing car for the sedate safety of the train. The last thing she expects is to have to use her trusty Beretta .32 to save lives. As the passengers sleep, they are poisoned with chloroform.

Phryne is left to piece together the clues after this restful country sojourn turns into the stuff of nightmares: a young girl who can't remember anything, rumors of white slavery and black magic, and the body of an old woman missing her emerald rings. Then there is the rowing team and the choristers, all deliciously engaging young men. At first they seem like a pleasant diversion....