No picture was ever more beautiful than Raphael's 'Pandora' Discovered in a Normandy chateau in 1944, she has cast her spell over the Belvedon family - all artists or dealers - for fifty years Now she is locked away in a turret of their lovely Cotswold house increasing her colossal value by the second Then an exquisite stranger rolls up, claiming to be a long-lost daughter of the family and setting the three Belvedon brothers at one another's throats During a firework party the picture is stolen Only after a nail-biting court case and a record-smashing Old Masters sale at Sotherby's is Pandora restored to her rightful home