After returning to Los Angeles from a group therapy session, documentary filmmaker Bob Sanders and his wife, Carol, find themselves becoming vigilante couples counselors, offering unsolicited advice to their best friends, Ted and Alice Henderson. Not wanting to be rude, the Hendersons play along, but some latent sexual tension among the four soon comes bubbling to the surface, and long-buried desires don't stay buried for long.
Out of hit ideas and seemingly in the twilight of his career, Broadway producer Russ Ward decides to give up the game. But when Russ lays off his nubile secretary, Ellie Brown, she shocks him with a declaration of love. Inspired, Ward commands playwright MacDonald to rewrite his latest show as a May-December romance starring Brown herself. Ward struggles to make a comeback as his ex-wife, Kathryn, plots to end his new relationship.
In this musical-comedy, Dean Martin plays an American hotel mogul who becomes smitten with a young Italian woman (Anna Maria Alberghetti) when buying a hotel in Rome. To marry this gal, he has to get her three older sisters married off.
Cuban Bandleader Ricky Ricardo would be happy if his wife Lucy would just be a housewife. Instead she tries constantly to perform at the Tropicana where he works, and make life comically frantic in the apartment building they share with landlords Fred and Ethel Mertz, who also happen to be their best friends.
