Set in 1930s Italian Riviera, Robert (Mark Umbers) and Meg (Scarlett Johansson) Windermere are happily married, living in high-society. But things change when the seductive Mrs. Erlynne (Helen Hunt) arrives from New York looking for her next victim. Lord Augustus (Tom Wilkinson) immediately falls for Mrs. Erlynne, but she has her eyes set on Robert, while Meg gets distracted by the advances of Lord Darlington (Stephen Campbell Moore).