King Arthur, Merlin and Splag arrive at a French chateau on their way to steal the fabled 'Rose en Verre' - a radiantly beautiful stained glass window installed in a remote Chateau in the heart of France. Lady M, King Arthur's Sister, outraged that this national treasure is going to the spoilt Guinevere, warns her brother of dark forces and irate peasants. Warnings that are ignored and all seems lost for our gallant King. Only Lady M's secret alter ego, the renegade Knight Sir Margaret, can save the King...but will she bother.