Rex Rowland, son of an American millionaire, visiting London, encounters The Duchess, The Count, and The Lady Emily, niece of The Duchess, and arranges to steal The Lady Emily from The Count, who plans to marry her. In hot pursuit through London and its environs, the couple appropriate a physician's car, drive to the suburbs, and escape in a powered canoe. Masquerading as another couple, they are received overnight as guests at a country estate. Later, the pursuers, both on water and land, are eluded; and after the couple are married in a quiet village, they end up in the bridal suite of a United States-bound liner.
—AFI