The foster mother of a runaway teenage mother and her infant son hires Hetty to locate the girl and find out if she's the serial arsonist who's been plaguing the area. 

A desperate mother hires Hetty to locate her schizophrenic son who has disappeared and is off his medication. 

When Robert's uncle and childhood hero commits suicide by hanging himself in his home, Hetty investigates and finds witchcraft may be involved. 

While vacationing in Tuscany Hetty is hired by a local restaurateur whose son has been kidnapped, possibly by Mafioso who have been mailing him the boy's fingers. 

A deaf-mute young man out bird-watching watches a couple necking in a car, but amusement turns to horror when he witnesses a murder. 

A spunky sexagenarian and her teenage runaway assistant join forces to form their own detective agency and investigate the death of an elderly pensioner. 

Hetty Wainthropp, a lady of a certain age, visits childhood friend Edith and discovers that her husband, Frank, has a son by a previous marriage. Hetty decides to turn amateur detective to trace him. This gives her a taste for detection, and she decides to set up a private detective agency.