Now an adult Englishman, Ibbetson is an architect working in Yorkshire on a restoration job for the Duke of Towers, a peer of the realm. He falls in love with Mary, Duchess of Towers, and she with him, although she is already married. When the duke discovers this, he callously demands they explain themselves. Peter then realizes that Mary is his childhood sweetheart. All these years, Mary has kept, in the dresser beside her bed, the dress she wore at their last childhood meeting.