The story explores the secret past of the Dowager Countess Violet Crawley (Maggie Smith) who comes into possession of a property in the South of France. Lord Grantham (Hugh Bonneville) and his family head to France to investigate why the villa was given to his mother. Meanwhile back at Downton, Lady Mary (Michelle Dockery) hosts a crew of filmmakers and actors who use the estate as a set for their new film.