The Favourite

In 1705, England is at war with France. Queen Anne is in poor health; she shows little interest in governing, preferring activities such as playing with her 17 rabbits, surrogates for the children she miscarried or who died in infancy. Her confidante, advisor, and furtive lover Sarah Churchill effectively rules the country through her influence over the Queen. Sarah's efforts to control Anne are undermined by Robert Harley, the Leader of the Opposition.
Abigail Hill, Sarah's impoverished younger cousin, arrives in search of employment. Her standing has been tainted by her father, who gambled her away in a game of whist. She is forced to do menial work as a scullery maid in the palace.
After seeing Queen Anne's gout, Abigail forages herbs for her. Sarah has Abigail whipped for entering the Queen's bedroom without permission but appoints her Lady of the Bedchamber after realising the herbs have helped the Queen. One night, Abigail witnesses Sarah and the Queen having sex. Harley asks Abigail to spy on them both, hoping to circumvent Sarah's authority. Abigail refuses and tells Sarah, implying that she knows about their secret.
Abigail kindles a friendship with Anne that becomes sexual. Sarah finds out and unsuccessfully tries to remove her. Knowing she has gained a powerful enemy and desperate to be a lady again, Abigail reconsiders Harley's offer. She drugs Sarah's tea, after which Sarah awakens in a brothel.
Anne, thinking Sarah has abandoned her, takes Abigail into her favour and allows her to marry Colonel Masham, thereby reinstating Abigail's noble standing as a Baroness. Abigail then helps Harley to influence the Queen's decisions about the war.
When Sarah returns, Abigail offers her a truce but is rejected. Sarah issues an ultimatum to Anne: change her stance on the war and send Abigail away or she will publicly disclose letters that detail their sexual relationship. Sarah, remorseful, burns the letters, but Anne nevertheless sends her away.
Lord High Treasurer and key advisor Godolphin convinces Anne to mend her relationship with Sarah, persuading Sarah to send a letter that Anne eagerly awaits. When Abigail, who has been promoted to Keeper of the Privy Purse, presents "evidence" that Sarah had been embezzling money, Anne does not believe her.
Sarah's letter arrives but is intercepted by Abigail, who burns it. Hurt that she did not receive the expected apology, Anne uses Abigail's claims about the embezzlement as an excuse to exile Sarah and her husband.
With Sarah gone and her position secure, Abigail begins to ignore Anne while indulging in society and openly having affairs. One day, she abuses one of Anne's rabbits. Anne, now very sick, sees what Abigail is doing, forces herself out of bed and angrily orders her to kneel and massage her leg. She gradually pulls Abigail's hair as Abigail winces and begrudgingly massages her.