Alianore and her husband receive a new commission from King Edward IV. He has heard that the Holy Grail is to be found somewhere within his dominions - and he wants them to find it At the same time, Jasper Tudor is suspected of trying to organise a new rebellion in Wales. Can he be stopped? Can the Grail be found? Will Alianore ever achieve her ambition of being allowed to retire to her home to grow gilly flowers?