In 1895, a patrol through a Wigan goodsyard ends with Detective Sergeant Robert Kidd stabbed to death, the first railway police officer killed in the line of duty. This History Hit production reconstructs the case through the London and North Western Railway's own investigation, tracing how a force built to police the new industrial rail network responded when one of its own was murdered. The film sets the crime against the desperate conditions of Victorian coal miners in Wigan, where poverty, drink, and the pressures of industrial labor fed into sudden violence. The courtroom becomes the film's second act: one suspect turns on another, testimony shifts, and the trial ends with one man hanged and another walking free, a verdict that still reads as uneasy more than a century later. Historians and archival records carry the narration, with period photographs and location filming standing in for the Wigan goodsyard as it was. It is as much a study of Victorian industrial Britain and its policing as it is a murder case.