Great Barwick's least popular man is murdered on a train. Twelve jurors sit in court. Four suspects are identified - but which of them is on trial? This novel has all the makings of a classic murder mystery, but with a twist: as Attorney-General Anstruther Blayton leads the court through prosecution and defence, Inspector Fenby carries out his investigation. All this occurs while the identity of the figure in the dock is kept tantalisingly out of reach.