1861, East Anglia. When Mr Swarbrick, the man working to unify East Angliaà â â s railway networks, is shot dead in a first class carriage, Inspector Colbeck is brought in to investigate. But as Swarbrickà â â s reputation begins to crumble, questions arise: is this the act of a bungling burglar, a business rival, a disgruntled son, or a jealous lover?