Jack & Susan in 1953

Regardless of what the calendar says, Jack and Susan are always, eternally, 27 years old. They are destined for each other like Hepburn and Tracy, Dagwood and Blondie, Nick and Nora. They always acquire a shaggy white dog. In 1953 Jack's engaged to be engaged to a margarine heiress, and Susan's got a dark and mysterious suitor, and New York is at its glamorous best. When word arrives that someone is trying to poison Susan's long-lost uncle, she and Jack (and Woolf!) head for Havana to rescue uncle James, apprehend the bad guys and hit a few casinos on the side.