In 1950s London, a widowed cleaning lady falls madly in love with a couture Dior dress, deciding she must have one. She embarks on an adventure to Paris that will change not only her own outlook -- but the very future of the House of Dior.

Victor, a disillusioned 60-something whose marriage is on the rocks, opts to relive the week of his life when, 40 years earlier, he met his true love through a company that allows customers to return to the time period of their choosing.