Twins sometimes run in families; in the Fentimans’ case, they positively stampede.

In 1937, Robert Fentiman is hanged for the murder of a barmaid. Twenty years later his ghost claims his innocence, and Rev Bernard Paltoquet is called on to help clear his name by the dead man’s son, Carl.

As Bernard and his pal Robbie begin their investigations, by a cruel twist of fate, another barmaid is murdered, who turns out to be the daughter of the first barmaid. And, by another twist of fate, Carl Fentiman is the main suspect.

A professional medium, with an unconventional use for a crystal ball, is called in to help solve both crimes, but she is as baffled as Bernard and Robbie. Meanwhile Bernard’s housekeeper, Mrs Aitch, has deserted the vicarage for a mysterious suitor….