Simon Slowe is a local 'character' whose methodical manner and skills of observation lead others in the small town of Gembrook to consult him when a local man is found murdered. It is at first thought that the murderer is Mary McArdle, whose shoeprints are found outside the window of the crime scene. Simon, however, is able to ascertain that the crime was actually committed by another man, a rival for Mary's affections, who was wearing her shoes at the time of the murder.