A military wife hires Hetty when a mysterious photographer starts stalking the woman's daughter and her fiancé. Tipped that an Australian is involved, Hetty and Geoffrey go undercover as "Aussies." They track down the mastermind and learn more than their client wants to know.

Hetty looks into a case of bullying when her great nephew is suspended from school, after someone plants an Ecstasy tablet in his blazer.

Robert goes undercover to help Hetty solve a case of stolen property involving a suspicious drowning. Posing as a wheelchair-bound millionaire, with Geoffrey along for the ride as his chauffeur, he finds himself at the scene of the "accident" in the company of a questionable character.