Spring, 1858. The route of the Caledonian Railway through the southern uplands of the Scottish countryside is disrupted by a fatal crash. Inspector Robert Colbeck and Sergeant Victor Leeming are called from the crime of London to investigate, and must contend with old enemy Superintendent Rory McTurk to uncover the criminals behind the disaster. The motive for the crash is unclear, with suspects including the North British Railway, a group of sabbatarians and those with personal vendettas to enact. Colbeck ..