In late 1950s Moscow, a smart new block of apartments has been built and everyone is desperate to live there. Newly-weds Sasha and Masha, Lidochka and her father Baburov with her friend Boris, an explosives expert and chauffeur Sergei and his construction worker friend Lucy all dream of having a place of their own. While keys are withheld from their rightful owners, Lucy lifts Boris and Lidochka up to their new home in her crane. And as Sasha and Masha host a house-warming party, government official Drebednyov, who illegally plans to knock two apartments into one for his ambitious new wife, comes bursting through the neighbouring wall. But the residents find away of exposing all the corruption and the wrong-doers are defeated, leaving everyone else to live happily ever after.