What do you do when you have a beautiful house, two great children and a marriage on the rocks? If you're bored Val Edwards (Deborah Kerr), you swap your fuddy-duddy hubby Dan (Frank Sinatra) for his swinging-bachelor best friend Ernie (Dean Martin) – and watch the sparks fly. The fun starts when the Edwardses take a second honeymoon in Mexico and fall into the hands of a quickie-divorce/quickie-marriage lawyer (Cesar Romero). Faster than jumping beans, everybody's unhitched, rehitched, confused and confounded.