An American soft drinks executive in West Berlin finds himself in trouble when his boss's 17-year-old daughter slips behind the Iron Curtain and marries a communist. Billy Wilder's Cold War comedy, starring James Cagney, Horst Buchholz, Pamela Tiffin and Arlene Francis.

C.R. MacNamara is a managing director for Coca Cola in West Berlin during the Cold War, just before the Wall is put up. When Scarlett, the rebellious daughter of his boss, comes to West Berlin, MacNamara has to look after her, but this turns out to be a difficult task when she reveals to be married to a communist.