A Head for Poisoning

On the way home to his castle in Wales, one of Geoffrey de Mappestone's knights is killed during an ambush. The knight had claimed to be carrying an important message for the King, but when Geoffrey tries to deliver it, he is faced with the King's orders to spy on his own family to ferret out a traitor.Meanwhile, the future of the family estate is already in jeopardy, and Geoffrey's father is found murdered with his own knife during the night. As Geoffrey investigates, he finds the danger reaches from his family all the way to the King.