In the early 18th century, England is at war with the French. A frail Queen Anne occupies the throne, and her close friend, Lady Sarah, governs the country in her stead, while tending to Anne's ill health and mercurial temper. When a new servant, Abigail, arrives, her charm endears her to Sarah. Sarah takes Abigail under her wing, and Abigail sees a chance to return to her aristocratic roots.