Jack Lemmon and Walter Matthau are reunited in this hysterically funny high seas romantic adventure. Gambler and con artist Charlie (Walter Matthau) is desperate to meet single, rich ladies with large bank accounts. When he persuades his lonely widower brother-in-law, Herb (Jack Lemmon), into accompanying him on a pleasure cruise, he neglects to mention that they will be working as dance hosts and masquerading as wealthy bachelors. Much to Herb's chagrin, their accommodations are in the bowels of the high-class ship, and they are forced to work for hilariously tyrannical cruise director Gil Godwyn (Brent Spiner). Herb dutifully dances his way into the heart of a lonely widower, Vivian (Gloria De Haven), pretending he is a doctor while Charlie cons high-stakes gamblers and sets his sights on a much younger oil tycoon, Liz (Dyan Cannon). As Charlie and Herb struggle to keep their real identities a secret, their romances blossom until the truth is revealed and they must act fast to save their newly discovered loves.