In the glittering and ruthlessly competitive world of opera, Maria Callas was known simply as la divina: the divine one. With her glorious voice, instinctive flair for the dramatic and striking beauty, she was the toast of the grandest opera houses in the world. But her fame was hard won: raised in Nazi-occupied Greece by a mother who mercilessly exploited her golden voice, she learned early in life to protect herself from those who would use her...