The children of well-to-do widow Gillian Snape are worried that her photographer-fiancé Lester Rose is marrying her for her money, and hire Hetty to investigate Rose's past. With Geoffrey's help, Hetty learns that Rose is a gambler and a gigolo with several previous identities. Surprising facts revealed by two women from his past and Hetty's tense undercover visit to his studio expose a somewhat less thorny side of the man. Still, is he the marrying kind?

Hetty goes undercover to a women's shelter in a confidential location - and where no man may enter. Detective Chief Inspector Adams suspects that the shelter's security has been severely compromised by an inside informer. Hetty's quest to find the leak opens her eyes to the terrifying realities of spousal abuse, and results in a gripping conclusion as she leads the women in defending their sanctuary against a violent motorcycle gang.

When a teenage pyromaniac terrorizes a neighborhood, the police are helpless as frightened victims refuse to testify against him. Enter Hetty, posing as the Irish sister-in-law of one of the residents. Her plan: infiltrate the local sewing circle and get the lowdown on Lenny the firebug and his gang.

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.

A clock aficionado suspects he's been handed stolen goods when two thugs bring him a valuable antique timepiece for repair. Meanwhile, Frank and Janet break Hetty's number-one rule by getting mixed up in a marital dispute. Oddly enough, the two cases turn out to be linked.

Missing gems and precious metals drive a mining community to madness as Hetty searches for buried treasure stashed by a miner killed in a cave-in. Hot on the trail of the lost loot, Geoffrey, too, is caught in an underground accident.

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.