A London Scotland Yard detective takes on a case in Melbourne and enlists the assistance of the narrator, Sam, recently joined. They investigate (in true Scotland Yard deduction style with errors on the part of the impulsive young detective) the theft of Lady Latimer's jewels on the eve of her wedding to a young captain. The lady's near-bankrupt finances, her fiancee's calculations, her step-daughter's scorn and her own shame result in a suicide as well as recovery of the jewels after chasing a steamer to Adelaide ... (PB)