Former highwayman Captain Billy Rhys travels incognito from Scotland to Pembrokeshire to investigate the death of a friend and comrade-in-arms and to uncover a plot to place James Stewart on the throne, which questions may be connected, especiallly as the Jacobite spy Charles Butler has been seen in the area. Billy uses the guise of being a groom to a stallion visiting many of the castles and manorhouses in the area. He is both helped and hindered...