A 12-year old boy, son of an Italian camp cook, is shot in the back and killed near the Orford Mountain Railway construction site in rural Quebec in August 1905. The crime is all the more staggering for being the second child murder on a railway in three days. A wave of shock and terror spreads throughout the area.rnrnThe police make arrests, but it becomes clear that the two suspects are not the murderers.rnrnFast forward a century. The archivist of a local historical society comes across the diary of a teenage girl who chronicled the weeks she spent with relatives nearby in August 1905. More by accident than design, she provides clues that help the narrator investigate and solve the century-old cold case of the murder on the Orford Mountain Railway.