A competitive walking race in Victorian London turns lethal when a contestant is found dead on the track. Sergeant Cribb is tasked with investigating the suspicious demise of a participant in a grueling six-day walking match. He must navigate the cutthroat world of professional pedestrianism, where gambling interests and intense rivalries create a volatile environment. The narrative follows a procedural framework, documenting the methodical collection of evidence and the interrogation of suspects within the rigid social hierarchies of the late 19th century.

Readers frequently highlight the meticulous historical research that brings the obscure sport of competitive walking to life. Discussion often centers on the effectiveness of Sergeant Cribb as a grounded, pragmatic investigator who contrasts sharply with more flamboyant fictional detectives. Critics observe that the pacing mirrors the endurance nature of the central event, providing a steady build-up of tension. The atmosphere is consistently praised for its authentic Victorian tone, which avoids romanticizing the era in favor of a gritty, realistic portrayal of urban life. Many readers appreciate the balance between the technical aspects of the investigation and the social commentary embedded within the plot.