Hetty is called in to investigate when one by one, the contestants in the Blainthorp Muiscal Festival lose their voices. The sponsor of the festival, Oliver Hardiman wants the mystery solved but Hetty only has five days.She finds herself caught up in a battle between rival pharmacists who may be using their skills to harm the finalists.

Hetty goes to visit a long lost cousin in a small fishing village near Whitby. She soon finds a client - an elderly lady who is being troubled by mysterious sounds of a dog barking. Meanwhile back home Robert plans an exposé on a local building firm - but are his facts correct - and Janet is having problems with an obnoxious neighbour who won't take no for an answer.

During a quiet hospital stay for surgery, Hetty uncovers a robbery ring run by nurses and helps clear D.C.I. Adams in a sexual assault frame-up. Meanwhile, Hetty's brother-in-law, Frank, gets mixed up with a lusty widow.

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.

Robert's brother Frank comes to stay, and brings Hetty the case of a missing Victorian school ma'am.

Hetty is approached by Hansi, a German gentleman whose golden years have been hampered by a painstaking search for his sister, whom he lost contact with during World War II. However, Hetty passes the case off to Geoffrey and Janet, when it comes to light that this is not the only pain Hansi has been suffering. Someone at his retirement community has been making pointed references to Nazism at Hansi, something he had never been a part of. The person is going so far as to deface Hansi's garden in the shape of a Swastika. Hetty goes undercover as a potential tenant of the retirement community, where she comes into contact with characters that seem to come right out of the mystery novel she's reading: a regimental romantic, a frail woman who has remained alone since her fiance's death in the war, among others. All seem to have motives for harming Hansi. Geoffrey and Janet find Hansi's nephew, only to find that he is ashamed of his uncle's German heritage and prefers to continue hiding. Mea

Hetty represents a neighbour at a creditors' meeting and her agency is asked to find a missing company director and his money.

Hetty is called in by the Mayor of Titterslow to look for his daughter who has runaway. She has learning difficulties and the Mayor and his wife want the matter of her disappearance to be kept very quiet. Hetty discovers that she left with her boyfriend, Bernard, who also has learning difficulties and that they were making their way to a country hotel.

An old friend of Hetty's - her partner in a music-hall routine years ago -- seeks her help in locating her troubled foster daughter, Chrissie. A teenage mother, Chrissie has disappeared just as a series of arson attacks on local homes have occurred --and Chrissie has a history of setting fires! As Hetty and Geoffrey look for Chrissie, a local newspaper photo competition reveals more than the photographer intended, prompting Geoff to dress in drag -- blonde wig, high heels and all -- to confront the arsonist. Hetty picks up a much-needed reward for her work in this case, and at the presentation of the check, proves that the new gumshoe hasn't lost her knack for the ol' soft-shoe!

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.

Hetty Waintthropp is annoyed at the cards celebrating her sixtieth birthday--they all offer her well wishes for ""joining the club"" of senior citizens and old-age pensioners, even though she's not entitled to a pension. Determined to make something of herself, Hetty gets a job at the local post office, where she proves her mettle quite quickly by throwing out a troublemaking biker and chasing down a shoplifter.

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

Hetty is called on by a pair of worried parents whose deaf-mute son, Malcolm, has disappeared while out bird-watching on the day he was to meet his mail-order bride from Thailand.

Hetty and Robert travel to the small village of Readsby, where his revered elderly uncle, a former professional soccer player, has apparently committed suicide. But Hetty doesn't believe it -- for one thing, where's the suicide note? And when she begins to suspect that the villagers of Readsby, once a notorious haven for witches, are engaged in satanic practices, she's determined to prove that they were somehow involved -- with surprising results!

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.

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?