In a majestic English home from the early 20th century, the lives of the Crawley family and their staff are shaken by the unexpected visit of royalty. As preparations for the arrival of the King and Queen of England are underway, family members grapple with their own personal crises. Robert, the Earl of Grantham, feels overwhelmed by the responsibility of maintaining the family honor, while his wife, Cora, strives to ensure that everything goes perfectly. Meanwhile, Mary, the eldest daughter, faces the challenge of modernizing the estate and her way of life, always living in the shadow of her late sister.
In the basement, the staff, from the loyal maitre dā, Carson, to the clever assistant, Daisy, prepares for the arrival of royalty. However, not everything is harmonious; conflicts between social classes emerge as a scandal from the past revives tensions and rivalries, testing the loyalty of everyone in the house. As the grand event approaches, each character is forced to confront their fears and desires, revealing secrets and long-hidden yearnings. With a tone as elegant as its setting, the film explores themes of love, loyalty, and tradition, as the family and their staff discover that, despite the changes in the outside world, true home lies in the heart of each one of them.