Living in Paris, journalist Bernard has devised a scheme to keep three fiancées: Lufthansa, Air France and British United. Everything works fine as long as they only come home every third day. But when there’s a change in their working schedule, they will be able to be home every second day instead. Bernard’s carefully structured life is breaking apart

Lieutenant Ted Jackson spends his lat day on active duty in the Navy disarming an underwater mine. While disarming the explosive he sees what appears to be a sunken ship. Overcome with curiosity, he investigates and finds a treasure chest filled with what he thinks are Spanish gold coins.