When an eclectic group of passengers boards a cruise ship bound for prewar Germany, they form a microcosm of 1930s society. One passenger, a mysterious countess, is headed for a German prison camp. The charming Dr. Schumann harbors a debilitating heart condition. Then there's American divorcée Mary Treadwell, who vainly attempts to outrun time itself. During their weeks at sea, the group forges bonds and rivalries, and unearths secrets.