In Christmastime Miami, heartbroken divorcée Giorgio invites himself to stay at his best friend Mario's — unaware that the latter is having an affair with his ex-wife — and ends up pursued by Mario's barely-of-age daughter; nosy and out-of-touch Ranuccio crashes his son's sex-themed holidays before ending up in a series of mishaps with Giorgio.
Fabio is in love with his colleague Linda, but she has never even seen him until he's mistaken for her boyfriend. Paolo and Mario leave for a luxurious vacation in Rio de Janeiro for Christmas, without knowing that their sons have booked a trip for the same low-cost destination and, for a problem of homonymy between fathers and sons, the two holidays are exchanged.
Milanese policeman Peppino and Neapolitan florist Ambrogio celebrate Christmas in the same ski resort town along with their families. After they discover that both their sons are dating, but have never met their girlfriends in person, the parents embark on a private war against those dating apps that seem to have reached almost everything and everyone.
We are in 2030, and on vacation we go to Mars! Having made his wife and son Giulio lose his tracks for years, Fabio (Christian De Sica) is about to marry the wealthy Bea on Mars. But what could happen if during an excursion into space, something goes wrong and Giulio suddenly becomes a sprightly old man (Massimo Boldi)? Between hilarious unexpected events and amusing misunderstandings, Fabio will find himself dealing with a seventy-year-old son and a marriage that is in danger of jumping ...