A chronicle of the life of 18th century aristocrat Georgiana, Duchess of Devonshire, who reviled for her extravagant political and personal lives. She is a vibrant beauty and celebrity of her time. But she is trapped in an unhappy triangle with her husband and his live-in mistress. She falls passionately in love with an ambitious young politician, and the affair causes a bitter conflict with her husband and threatens to erupt into a scandal.