As the preparations for her lavish country wedding get underway, young bride-to-be Dolly Thatcham (Felicity Jones
) reunites with her former lover Joseph (Luke Treadaway
), and begins to have second thoughts about her impending nuptials. England, 1932: Dolly's family has assembled at a sprawling country manor to see her tie the knot when Joseph shows up unexpectedly. The previous summer, Joseph and Dolly experienced rapture in one another's arms, and as the hour of her wedding approaches, old passions are reignited. Meanwhile, Dolly's mother (Elizabeth McGovern
) remains determined to ensure that the ceremony transpires without incident. As the temptation to run away with Joseph grows, Dolly must choose between a stable future with her devoted fiancé or a life less ordinary with the man who swept her off her feet.