As King Edward I arrives in York for a secret meeting with the leaders of the military Order of the Temple, an attempt is made on his life. The would-be assassi... » 

As King Edward I arrives in York for a secret meeting with the leaders of the military Order of the Temple, an attempt is made on his life. The would-be assassin is later found dead, engulfed by a mysterious fire and wearing the Templar Order livery. Hugh Corbett is called on to investigate. «