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 …

This coarse bedroom farce takes place at the St. Moritz ski resort over a Christmas vacation. Among the couples whose lives intersect are a widowed artist honeymooning with his second wife, a gay man traveling with his son and his lover (and hiding each from the other), a snobbish couple from Milan who have been forced to share a suite with a pair of crass Romans, etc.