A failed gambler, intent on meeting a rich widow, tricks his widowed brother-in-law into boarding a cruise ship as dance hosts with the promise that there will be plenty of available and lonely women at sea. Once on the ship, his promise proves accurate, and the duo starts to romance the ladies.
The desperately overboard coming-attractions clip suggests something like Speed 0: Bladder Control--so it's a relief that this film's own seamanly "action" finale involves nothing more adventurous than shooting off a flare.