Adam Blackstock, is taking an ancient manuscript, "The Cloister Map," to be deciphered by his brother. But Blackstock is slaughtered. Three years later, Von Paulents, arrives in possession of "The Cloister Map." Sir Hugh Corbett is sent by the king to negotiate for ownership. But less than 24 hours after their arrival, Von Paulents has been barbarously assassinated. It falls to Corbett to investigate...