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